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Aaron Bummer

Which Players Could White Sox Make Available Closer To The Trade Deadline?

By Steve Adams | May 1, 2023 at 11:59pm CDT

I wrote about the calamitous White Sox start on Friday, and over the weekend the team went 1-2, snapping a nine-game losing streak with a stunning seven-run bottom half of the ninth inning, walking off the Rays in the process. Even if that win sparks some momentum for a listless South Side club, the Sox are already nine back in the AL Central. They’d need to play at an 82-51 pace (.617) to get to 90 wins. It’s not even clear that’d be enough for a division win, with the Twins playing at a 95-win pace.

Early May is pretty early to be doing any forward-looking breakdown of what a team might have to offer at this year’s trade deadline, but the current state of the White Sox is a bit more dire than usual. Their playoff odds at FanGraphs have plummeted from 30.5% prior to the season to just 4.2% now. PECOTA has their playoff odds at just 3.2%. They have MLB’s second-worst run differential (-65) and are already battling myriad injuries with some glaring depth issues.

One of the most frequently asked questions over the past week in the chats we host at MLBTR has been one of who could be available if the Sox sell this summer. With that in mind and with an obligatory “it’s still only May 1” caveat, here’s a quick rundown of the possibilities and how they’ve begun the season.

Rental Players

The most obvious candidates to change hands if the Sox do indeed end up selling, all of these players are set to be free agents at season’s end anyhow. There are a couple of qualifying offer candidates within the group, so the Sox would need to feel they’re getting more than the value of a compensatory draft pick back in those instances.

Lucas Giolito, RHP, 28, $10.4MM salary

Giolito won’t turn 29 until mid-July and stands as one of the potential top arms on next offseason’s free-agent market … if he can round back into form this season and put an ugly 2022 campaign behind him. From 2019-21, the former first-round pick was one of the American League’s top arms, making the All-Star team in ’19 and securing Cy Young votes in all three of those seasons — including sixth- and seventh-place finishes in 2019 and 2020, respectively. During that stretch, Giolito logged a collective 3.47 ERA with a huge 30.7% strikeout rate and solid 8% walk rate.

The 2022 season was another story. Giolito’s fastball dropped from the 94.2 mph it averaged during that three-year peak down to 92.7 mph. His strikeout rate fell to an above-average but still-diminished 25.4%. His walk rate crept up a bit, to 8.7%. His opponents’ average exit velocity jumped from 87.8 mph to 88.8 mph, and his hard-hit rate rose from 34.5% to 39%. None of those are awful numbers, but everything went the wrong direction for Giolito in ’22. A huge .340 BABIP surely contributed to some of his struggles — being a fly-ball pitcher with the worst outfield defense in baseball isn’t fun — but it wasn’t a great season regardless.

Giolito’s picked some velocity back up early this season. His 23.1% strikeout rate isn’t near its peak, but his 4.1% walk rate is far and away a career-best mark. If the White Sox sell, Giolito will likely be one of the best and most in-demand starters on the market. He’s out to a decent start, and with his track record, age and upside, a qualifying offer seems likely, barring a disastrous collapse. The Sox would need to feel they got more value than they’d net in the form of a compensatory draft pick.

Reynaldo Lopez, RHP, 29, $3.625MM

Lopez has had a terrible start to the season, with an 8.76 ERA and five home runs allowed in just 12 1/3 innings (3.65 HR/9). He was very good in the ’pen in 2021-22, however, notching a 3.07 ERA with an above-average 24.8% strikeout rate and a 5.3% walk rate. In 2023, Lopez is sporting a career-best 33.3% strikeout rate, and he’s averaging a career-high 99.2 mph on his heater. His 14.6% swinging-strike rate is excellent. If Lopez who allowed just one home run in 55 2/3 innings last year, can get past this bizarre home run spike, he still has obvious late-inning potential and is the type of affordable power arm who’d appeal to other clubs.

Mike Clevinger, RHP, 32, $12MM

Clevinger technically has a 2024 option on his contract, but mutual options are almost exclusively accounting measures and are exercised by both parties with only the utmost rarity. He’s still just 32 years old, by Clevinger’s halcyon days feel like they were a lot longer ago than 2017-20. He missed the 2021 season following Tommy John surgery, came back with a diminished fastball and middling peripherals in ’22, and hasn’t looked much better in 2023, with a 4.60 ERA, below-average 19.3% strikeout rate and ugly 11.1% walk rate in 29 1/3 innings. Clevinger has gained some but not all of the life on his heater back, and his current 8.1% swinging-strike rate is both well below the league average (11.1%) and easily the lowest mark of his career. He’s pitching like a fifth starter right now, and not a particularly cheap one.

Elvis Andrus, 2B/SS, 35, $3MM

Andrus was great with the White Sox in place of an injured Tim Anderson down the stretch in 2022 (.271/.309/.464, nine homers, 11 steals) and has been the opposite so far in 2023, hitting .206/.274/.245 in 113 plate appearances with well below-average quality of contact, per Statcast. He can still play defense and has now shown a willingness to log some time at second base, so another club could look at him as a slick-fielding utility option. He’ll need to hit more than he has in the season’s first month, though.

Hanser Alberto, INF, 30, $2.3MM

Alberto has typically been a solid defender at three infield spots with good bat-to-ball skills, a bottom-of-the-barrel walk rate and minimal power. This season, however, he’s made some glaring misplays at third base and batted just .211/.211/.368 in 19 plate appearances before hitting the IL with a quad strain. It’s a tiny sample, but he needs to get healthy and play better to even make it to the trade deadline on the big league roster.

Yasmani Grandal, C, 34, $18.25MM

The switch-hitting Grandal has bounced back at the plate with a .241/.323/.446 batting line (114 wRC+) and three homers in 93 plate appearances. His 8.6% walk rate is well down from its career 14.5% level, and his once-vaunted defensive ratings have fallen below average at 34. Given his considerable salary, Grandal is only changing hands if the ChiSox eat a good portion of the bill.

Signed/Controlled for One Extra Year

Moving anyone from this group would signal a more aggressive seller’s standpoint from the front office, but the Sox would generally be able to retain their core players while also unlocking larger returns than they’d be land for their generally modest collection of rentals.

Tim Anderson, SS, 30 | $12.5MM in 2023, $14MM club option for 2024

Anderson batted above .300 in four straight seasons from 2019-22, turning in an overall .318/.347/.473 slash that was 23% better than league average, by measure of wRC+. The two-time All-Star is a regular threat for 15 to 20 home runs and 15 to 25 steals. Defensive metrics are mixed on his work at shortstop, but his only across-the-board below average season per DRS, UZR and OAA came in 2022, when he was hobbled by a groin strain. Anderson is a well above-average regular with All-Star potential and a highly affordable salary through the 2024 season.

The White Sox’ top prospect is 2021 first-rounder Colson Montgomery, who has become one of the game’s top-ranked shortstop prospects. He opened the season on the shelf with an oblique strain but could be ready for a big league look in 2024 after reaching Double-A as a 20-year-old in 2022.

Lance Lynn, RHP, 36 | $18.5MM in 2023, $18MM club option for 2024

Lynn, 36 next week, hasn’t been himself so far in 2023. His 10.1% walk rate is his highest since 2018 by a wide margin, and he’s allowed a jarring 2.20 homers per nine frames. The 94.4 mph he averaged on his heater in 2019-21 is down to 92.6 mph in 2023, and while he’s still missing bats in the zone and off the plate, Lynn has allowed too much hard contact when opponents do connect. Hitters posted just a .192/.238/.335 slash against Lynn’s four-seamer as recently as 2022, but they’re hitting .283/.365/.587 when putting the pitch in play this year. The 2019-22 version of Lynn is well worth that 2024 option price, but he needs to solve his home run woes.

Liam Hendriks, RHP, 34 | $14MM in 2023, $15MM club option for 2024

Hendriks hasn’t pitched this season but recently announced that he’s cancer-free after battling non-Hodgkins lymphoma for the past several months. Hendriks is one of the game’s best relievers, and the priority is simply getting back on the field. If he looks like himself, he’d garner interest.

Joe Kelly, RHP, 35 | $9MM in 2023, $9.5MM club option for 2024

Kelly has been on the IL three times since signing a two-year, $17MM deal with the White Sox prior to the 2022 season. He also has a 6.26 ERA and a 12.6% walk rate with the South Siders. He’s still missing bats, racking up grounders and has had improved command in his tiny 4 2/3  inning sample this season. The Sox might have to eat some money to move him even if he’s pitching decently.

Kendall Graveman, RHP, 32 | $8MM in 2023, $8MM in 2024

Graveman is still throwing hard and missing bats at a solid clip, but his sinker isn’t getting grounders anywhere near its prior levels. He’s sitting on a 38.7% ground-ball rate in ’23 after living at 54% in 2021-22 and 52.1% in his career prior to the current season. On a surely related note, he’s giving up homers at a career-worst rate (2.38 HR/9). Graveman’s first season in Chicago was solid, but he’s at risk of becoming another high-priced bullpen misstep.

Jake Diekman, LHP, 36 | $3.5MM in 2023, $4MM club option for 2024

The White Sox acquired Diekman from the Red Sox at last year’s trade deadline even though he’d walked 17.5% of his opponents in Boston, and the command has only gotten worse. Diekman has walked a whopping 13 of his 58 opponents (22.4%) in 2023 while posting a 7.94 ERA. Command has always been a weak point, but this current rate just isn’t tenable. If he can’t right the ship, it’s hard to imagine him lasting on the roster until the trade deadline.

Longer Term Players

Moving anyone from this bunch is tougher to envision, as it would effectively signal a larger-scale rebuilding effort. While the Sox could still move one or even multiple players from this group without necessarily embarking on a full-scale rebuild, these moves would represent a clear step back from contending not only in 2023 but likely in 2024 at the very least — quite possibly longer.

Dylan Cease, RHP, 27 | $5.3MM in 2023, arb-eligible in 2024-25

Trading Cease would amount to waving a white flag not only on this season but on the entire rebuild that the Sox went through from 2016-20. Cease finished runner-up to Justin Verlander in American League Cy Young voting last year and was so dominant — 2.20 ERA, 30.4% strikeout rate, 6.4 bWAR in 184 innings — that he might’ve won in another year where he wasn’t chasing a historic comeback effort from a future Hall of Famer.

Cease’s velocity, strikeout rate and swinging-strike rate are all down a bit this season, but not in glaring, concerning fashion. He’s sporting a 4.15 ERA, though practically all the damage against him came at the hands of the Rays last week when the hottest team in baseball tagged him for seven runs. Cease won’t turn 28 until December. He’s a power-armed, bat-missing monster with two years of arbitration remaining after the current season. Pitchers like this almost never get traded, and it’s extra-tough to see the White Sox biting the bullet and making a move, since doing so just feels like a giant concession. If they do reach that point, Cease could generate one of the biggest hauls in recent trade deadline memory.

Michael Kopech, RHP, 27 | $2.05MM in 2023, arb-eligible in 2024-25

It’s been a poor start for Kopech (7.01 ERA in 25 2/3 innings) thanks to wobbly command that has manifested in a career-high 11.1% walk rate and, more problematically, a career-worst 2.81 HR/9 mark. Still, he’s a 27-year-old who once ranked as the sport’s top pitching prospect and as recently as 2021-22 logged a combined 3.53 ERA, 26.7% strikeout rate and 10.4% walk rate in 188 2/3 innings.

Kopech spent nearly all of the 2021 season in the bullpen as he worked back from Tommy John surgery and fanned a gaudy 36.1% of his opponents in that role. He’s a high-upside arm and has already seen his average fastball creep up from 95.1 mph in 2022 to 96.2 mph in 2023. Teams would love to get their hands on Kopech right now, and if he can cut back on the walks and homers, his value will only increase. This trade wouldn’t necessarily be the white flag that the Cease trade would be, but it’s hard to see Kopech going unless the Sox are pessimistic about their chances in the next couple of seasons as well.

—–

There are other names to consider, though each comes with plenty of red flags. Yoan Moncada is signed through 2024 and controllable through a 2025 club option, but he’s been neither healthy enough nor consistently productive enough to make the remaining $43.1MM in guarantees on his deal feel palatable for a trade partner. Luis Robert Jr., Eloy Jimenez, Andrew Vaughn and Aaron Bummer are all signed or controlled through at least 2026 (2027 in Robert’s case), which lessens any urgency to move those players. As it stands, the Sox would be selling low on anyone from that group of talented players. No one from that group feels likely to be a serious trade candidate this summer.

Of the three buckets listed above — “rental,” “one extra year” and “longer-term” — the rental pieces are the likeliest to go. Selling anything beyond that point, particularly a face of the franchise like Anderson or a controllable Cy Young-caliber talent like Cease, would likely signal a step back and longer-term rebuilding effort just two years after the Sox sought to emerge from their prior rebuild. Owner Jerry Reinsdorf is as loyal as they come, but one can imagine that the current meltdown could test even his patience; GM Rick Hahn candidly acknowledged last week in public comments that his job is likely on the line.

The White Sox still have a couple months to try to turn things around, but if things don’t improve in a hurry, then many of the names listed above will the most frequently discussed players on the 2023 summer rumor mill as contending teams look to beef up their rosters in advance of a postseason push.

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Chicago White Sox MLBTR Originals Aaron Bummer Andrew Vaughn Dylan Cease Eloy Jimenez Elvis Andrus Hanser Alberto Jake Diekman Joe Kelly Kendall Graveman Lance Lynn Liam Hendriks Lucas Giolito Luis Robert Michael Kopech Mike Clevinger Reynaldo Lopez Tim Anderson Yasmani Grandal Yoan Moncada

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White Sox Reinstate Aaron Bummer, Outright Tobias Myers

By Anthony Franco | September 5, 2022 at 5:09pm CDT

The White Sox announced that reliever Aaron Bummer and third baseman Yoán Moncada have been reinstated from the injured list prior to this afternoon’s game against the Mariners. Outfielders Adam Haseley and Mark Payton were optioned to Triple-A Charlotte to create active roster space. Bummer had been on the 60-day injured list, so the Sox needed to clear a 40-man roster spot for him. That’s been achieved by sending righty Tobias Myers — whom the club hadn’t previously announced was designated for assignment — outright to Charlotte after he went unclaimed on waivers.

Bummer is in position to make his first MLB appearance in three months. The left-hander last pitched on June 7, then landed on the IL with a left lat strain a couple days later. Bummer’s absence led the Chicago front office to target southpaw bullpen help in advance of the trade deadline, and they eventually sent catcher Reese McGuire to Boston for Jake Diekman. Bummer will reassume his role as the primary lefty for acting manager Miguel Cairo, as he’d been off to another strong start. Through 17 2/3 innings, he posted a 3.06 ERA with a solid 26.3% strikeout rate and an elite 58.3% ground-ball percentage.

Moncada missed the minimum amount of time after suffering a left hamstring strain during the final few days of August. It was the third IL stint of the year for the switch-hitting infielder, who also landed on the shelf with an oblique injury and a strain of his other hamstring earlier in the year. Those injures have seemingly prevented Moncada from getting into any sort of groove, as he’s slumped to a career-worst .197/.269/.313 line over 324 plate appearances this season.

The Sox added Myers on deadline day, claiming him off waivers from the Giants. The 24-year-old has started five games with Charlotte since then, allowing a staggering 16 runs (15 earned) with 11 walks and eight strikeouts. It’s the continuation of a nightmarish season for Myers, who has worked exclusively at Triple-A between the Guardians, Giants and White Sox organizations. He owns a 7.35 ERA in 71 frames between the three clubs’ top affiliates.

Those struggles have come largely out of nowhere, as Myers posted a slid 3.90 ERA with a huge 30.5% strikeout rate in 117 2/3 innings between Double-A and Triple-A in 2021. That led Cleveland to acquire him from the Rays last November and immediately add him to the 40-man roster to keep him from being selected in the Rule 5 draft, but things have since unexpectedly gone backwards. Myers, who has yet to make his MLB debut, will now have to try to work his way back onto a 40-man roster. He’ll be eligible for minor league free agency at the end of this year if Chicago doesn’t first reselect him onto the 40-man.

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Chicago White Sox Transactions Aaron Bummer Tobias Myers Yoan Moncada

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White Sox Select Mark Payton

By Anthony Franco | September 2, 2022 at 4:08pm CDT

The White Sox announced they’ve selected outfielder Mark Payton onto the MLB roster in advance of tonight’s game with the Twins. He’ll take the roster spot of center fielder Luis Robert, who’s going on paternity leave. To create a 40-man roster spot, reliever Aaron Bummer has been transferred from the 15-day to the 60-day injured list.

Payton, 30, signed a minor league contract with Chicago in Spring Training. He’s spent the year at Triple-A Charlotte, putting up an impressive .289/.365/.522 line with 20 home runs and 11 stolen bases over 465 plate appearances. He’s made a strong impact from a power perspective, walked at a quality 9.7% clip and is striking out in fewer than 15% of his trips to the dish. It’s the latest in a long line of excellent Triple-A showings for the University of Texas product, who now carries a .295/.369/.509 line over parts of six seasons at the minors highest level.

A Chicago native, Payton will now add some outfield insurance to the bench for acting manager Miguel Cairo. He’s covered all three outfield positions in the minors, although he only worked in the corners during a 32-game MLB cameo with the 2020-21 Reds (his only big league experience to date). It could be a brief stint, with Robert expected back imminently.

Players on the paternity list are permitted to miss between one and three games. Regardless of how long he remains on the active roster, Payton’s call-up marks a deserved recognition of his strong Triple-A production. He does still have a minor league option year remaining, so the White Sox could move him back to Charlotte without taking him off the 40-man roster upon Robert’s return if they’re so inclined.

Bummer’s transfer is no more than a formality. He’s ruled out for 60 days from the time of his initial IL placement on June 9, meaning he’s eligible for reinstatement whenever he’s ready to return. Bummer began a rehab assignment in Charlotte on Wednesday and figures to make it back to Guaranteed Rate Field within the next couple weeks.

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Chicago White Sox Transactions Aaron Bummer Mark Payton

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White Sox Notes: Robert, Grandal, Bummer, Bullpen

By Anthony Franco | July 22, 2022 at 9:30pm CDT

The White Sox placed center fielder Luis Robert on the 10-day injured list due to blurred vision before tonight’s contest with the Guardians. The placement is backdated to July 19, meaning he’ll first be eligible to return a week from now. He’s been dealing with lightheadedness for the past week, and the team will give him a bit more time to work through the issue.

It doesn’t seem to be a huge concern, as general manager Rick Hahn told reporters (including Vinnie Duber of CHGO Sports) the team was hopeful he could return after a week. Even if he’s back when first eligible, Chicago will have to go a couple pivotal series without arguably their top position player. Robert is hitting .301/.334/.461 with 12 home runs and 11 stolen bases across 323 plate appearances.

In a corresponding move, the Sox reinstated backstop Yasmani Grandal from the IL. Lower back spasms cost the switch-hitting catcher around five weeks. Now that he’s back to health, Grandal will try to get on track after struggling through arguably his worst couple months as a major leaguer. He carries just a .185/.294/.237 line through 201 plate appearances, a shocking downturn for a player who hit .240/.420/.520 last season.

In other injury news, reliever Aaron Bummer told reporters this afternoon he remains about three weeks from getting back onto a mound (via James Fegan of the Athletic). Bummer, who has been out since the second week of June due to a lat strain, is hoping to return to the major league club at some point in early September. That makes it a virtual lock he’ll be transferred to the 60-day injured list whenever Chicago needs a 40-man roster spot, and his still faraway return timeline will play a role in the team’s deadline approach.

Hahn told reporters that, in light of Bummer’s injury, relief pitching is “probably the most obvious need” for his club (via Jesse Rogers of ESPN). The Sox have invested heavily in the bullpen in recent seasons, signing Liam Hendriks, Kendall Graveman and Joe Kelly to multi-year free agent deals (in addition to a lengthy contract extension for Bummer). They’ve nevertheless been a middle-of-the-pack group this year, checking in 17th in ERA (3.90) and 13th in strikeout/walk rate differential (14.9 percentage points). That’s partially due to injury, as Bummer, Hendriks and Kelly have all spent time on the injured list.

Chicago has gotten strong work from both Hendriks and Graveman, as well as former starter Reynaldo López. Along with Kelly, that’s a formidable group of right-handers, but the Sox are down to Tanner Banks as their top southpaw with Bummer on the shelf. Banks has a respectable 3.05 ERA through 38 1/3 innings, but he’s only generating swinging strikes at an 8.4% clip and has a subpar 20.9% strikeout rate.

A southpaw feels like a logical target for Hahn and his staff over the next week and a half. The division-rival Tigers could market Andrew Chafin, who’s likely to decline his player option and hit free agency at the end of the season. Detroit also has hard-throwing Gregory Soto, but he’s controllable through 2025, so the Tigers probably aren’t keen on dealing him to a division rival. Other left-handed relief trade candidates include Joe Mantiply (D-Backs), Steven Okert and Richard Bleier (Marlins) and Matt Moore (Rangers). The Angels Aaron Loup could also draw some interest, although he’s playing on a $7.5MM salary in both this season and next, as well as having a $2MM buyout on a 2024 club option. That could make him a tough fit for a Chicago team running a franchise-record payroll even if the Halos were willing to move him.

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Chicago White Sox Aaron Bummer Luis Robert Yasmani Grandal

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White Sox Select Seby Zavala, Designate Yermin Mercedes

By Darragh McDonald | June 12, 2022 at 11:35am CDT

The White Sox announced a series of roster moves today, selecting the contract of catcher Seby Zavala and designating first baseman Yermin Mercedes for assignment. They also recalled lefty Tanner Banks. To make room on the active roster for Zavala and Banks, lefty Aaron Bummer was placed on the 15-day injured list, retroactive to June 9, due to a lat strain, while righty Davis Martin was optioned to Triple-A.

Zavala appeared in the majors with the White Sox in 2019 and 2021, getting into 42 games and hitting .171/.223/.343. He was outrighted off the roster in April and has been in Triple-A Charlotte, having a much better showing. He’s hit .282/.396/.535 through 41 games with the Knights, amounting to a wRC+ of 147, though with a 35.5% strikeout rate. He’s actually played more first base than catcher this year, though he’s likely needed on the big league club for extra depth behind the plate. Yasmani Grandal left yesterday’s game with hamstring tightness and will be unavailable for a while, even though he hasn’t been placed on the IL. Zavala and Reese McGuire will handle the catching duties until Grandal recovers enough to rejoin them.

As for Mercedes, this has the potential to conclude his tenure with the White Sox, a relationship that has not always gone smoothly. Last year, the Twins sent utility player Willians Astudillo to the mound in a game they were losing 15-4 to the Sox. Mercedes drew the ire of some unwritten rules fetishists by swinging at a 3-0 pitch from Astudillo and depositing over the fence for a home run. The Twins responded by throwing behind Mercedes in a subsequent game, which garnered suspensions for reliever Tyler Duffey and manager Rocco Baldelli. In the media dustup that followed, many White Sox players defended Mercedes, but White Sox manager Tony La Russa publicly spoke out against his own player and those who defended him.

Later in the season, Mercedes was optioned to the minors, which was followed by him announcing that he planned on stepping away from baseball, apparently posting his decision on Instagram before telling the team about it. However, it turned out to be a false alarm, as Mercedes quickly returned to the team in short order.

This year, Mercedes underwent hand surgery in March though was able to return and make his season debut in Triple-A in May. Through 25 games with the Knights, he’s hitting .230/.376/.426 thanks to a whopping 18.3% walk rate. All that amounts to a wRC+ of 120, or 20% above league average. Mercedes has always hit at every level, including the majors, though he doesn’t provide much value with the glove. Although he came up as a catcher, he’s gradually spent less time behind the plate, making 15 starts at DH this year and nine at first base, none behind the dish. The 29-year-old is in his final option year, meaning he could garner interest from any team willing to give him a 40-man roster spot. He could be stashed in Triple-A for the remainder of the year as a bat-first depth option. The White Sox will have one week to trade him or put him on waivers.

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Chicago White Sox Transactions Aaron Bummer Davis Martin Seby Zavala Tanner Banks Yermin Mercedes

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White Sox Reinstate Aaron Bummer

By Darragh McDonald | May 22, 2022 at 12:53pm CDT

The White Sox announced that, prior to today’s doubleheader, left-hander Aaron Bummer has been activated from the injured list. No corresponding move is necessary at this time, as the club is allowed to carry 27 players on their active roster for today’s doubleheader, instead of the usual 26.

Bummer, 28, landed on the injured list two weeks ago due to a knee issue. This is the sixth straight season of Bummer appearing out of the club’s bullpen, having thrown 198 career innings with a 3.23 ERA, 26% strikeout rate, 11% walk rate and 67.9% ground ball rate. He’s been moving up the depth chart to higher leverage responsibilities, having notched 67 holds in that time. He got off to a bit of a slow start this year, logging a 4.91 ERA over his first 11 innings, though it’s possible this knee issue has been a factor.

Bummer and Garrett Crochet were set to be the club’s top lefties coming into the season, though Crochet underwent Tommy John surgery in April and Bummer has been on the shelf for the past couple of weeks. In that time, the club has turned to Bennett Sousa and Tanner Banks as bullpen southpaws, who have held their own in limited action so far. Sousa has an ERA of 3.46 through 13 innings, though his 17% strikeout rate and .216 BABIP suggest there might be a bit of good luck buoying that performance. Similarly, Banks has a 3.00 ERA through 18 innings, though with a 17.6% strikeout rate and .216 BABIP. Both of them have options and could be sent down at some point before Tuesday’s game, when the club will need to shrink the size of their roster back down to 26.

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Chicago White Sox Transactions Aaron Bummer

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White Sox To Activate Yoan Moncada, Joe Kelly From 10-Day IL; Aaron Bummer To Be Placed On 10-Day IL

By Mark Polishuk | May 8, 2022 at 6:15pm CDT

The White Sox are set to activate Yoan Moncada and Joe Kelly off the injured list for Monday’s game against the Guardians, manager Tony La Russa told reporters (including LaMond Pope of The Chicago Tribune).  Both players will be playing in their first games of the 2022 season, and in Kelly’s case, it also marks his debut in a White Sox uniform.

Moncada suffered a right oblique strain near the end of Spring Training, and it would like the third baseman is back in form, given how he has shredded Triple-A pitching during a rehab assignment.  Moncada will be looking to build on a solid 2021 season that was perhaps slightly disappointing because it was “only” solid, given all of the superstar hype attached to Moncada during his time as baseball’s best prospect.  2019 saw Moncada reach a higher level of performance, though as he enters his age-27 season, it isn’t yet clear if Moncada will indeed become an All-Star.

Kelly signed a two-year, $17MM contract just after the lockout ended, as between Kelly and fellow free agent Kendall Graveman, the Sox reinforced their bullpen depth in advance of Craig Kimbrel being traded to the Dodgers.  Due to a biceps strain suffered during the NLCS last season, Kelly’s offseason prep work was delayed, hence his late start to the 2022 campaign.

With Moncada and Kelly back, the White Sox will gain some relief from the swath of injuries that have hampered their club all season.  However, it’s a case of two steps forward and another step back, as La Russa told reporters (including Daryl Van Schouwen of The Chicago Sun-Times) after today’s game that reliever Aaron Bummer will be placed on the injured list with a knee problem.  Kelly will take Bummer’s spot on the 26-man roster.

A reliable bullpen arm over his five previous seasons in Chicago, Bummer has gotten off to a slow start, with a 4.91 ERA and 15.1% walk rate over his first 11 innings of work in 2022.  The extra walks certainly haven’t helped Bummer’s efforts, but there is also at least a little bad luck involved, as the grounder specialist has a .370 BABIP.  It isn’t known how serious Bummer’s knee issue is, or how long the left-hander could be out of action.

Rookies Tanner Banks and Bennett Sousa are now the only healthy left-handers in the Sox bullpen, and Anderson Severino (another first-year player) is the only other southpaw reliever on Chicago’s 40-man roster.  While Banks has pitched well thus far, it stands to reason that the White Sox might look to add a more experienced left-handed arm if Bummer is expected to miss beyond the 10-day minimum.

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Chicago White Sox Transactions Aaron Bummer Joe Kelly Yoan Moncada

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White Sox Activate Michael Kopech; Aaron Bummer, Evan Marshall Placed On 10-Day IL

By Mark Polishuk | June 30, 2021 at 4:14pm CDT

The White Sox have reinstated right-hander Michael Kopech from the 10-day injured list, and also called up left-hander Jace Fry from Triple-A Charlotte.  The moves come in response to a pair of bullpen injuries, as both southpaw Aaron Bummer (right hamstring strain) and righty Evan Marshall (strained right flexor pronator) are headed to the 10-day IL.

Due to a Tommy John surgery and then a COVID opt-out, Kopech’s 31 1/3 innings this season marked his first big league action since his debut campaign of 14 1/3 frames in 2018.  One of the game’s more highly-touted pitching prospects, Kopech has displayed that potential with a 1.72 ERA and a 36% strikeout rate this season before a strained left hamstring sent him to the IL on a retroactive May 28th placement.

The White Sox planned to keep Kopech in a hybrid swingman role a way of managing his innings, and it’s possible he could get more looks out of the pen in the near future considering the absences of Bummer and Marshall.  Chicago manager Tony La Russa told reporters (including James Fegan of The Athletic) that the club is hopeful Bummer is able to return after a minimal stint on the IL, though Marshall will be out of action for a to-be-determined longer period of time.

Bummer has a 3.26 ERA over 30 1/3 innings, with his typically large ground ball rate (a career-best 74%) as well as a 32.1% strikeout rate that would be a career high by a large margin over a full season.  Bummer has been an effective weapon out of Chicago’s bullpen for five years now, with the exception of an injury-shortened 2020 campaign.

Marshall pitched well last season to help account for Bummer’s absence, but 2021 has been a much tougher ride for the right-hander.  Marshall has a 5.60 ERA over 27 1/3 innings, due to the combination of a larger-than-usual homer rate, a below-average strikeout rate, and a 40.8% grounder rate that is well south of his 52.6% career average.

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Chicago White Sox Transactions Aaron Bummer Evan Marshall Jace Fry Michael Kopech

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White Sox Designate Steve Cishek, Ross Detwiler For Assignment

By Steve Adams | September 24, 2020 at 12:19pm CDT

The White Sox on Thursday announced that they’ve designated veteran right-hander Steve Cishek and lefty Ross Detwiler for assignment. Their spots on the active and 40-man rosters will go to lefties Aaron Bummer and Carlos Rodon, who have been reinstated from the 45-day injured list.

Cishek, 34, inked a one-year, $6MM deal with the ChiSox this past winter — a pact that contained a $5.25MM salary and a $750K buyout on a $6.75MM club option for 2021 that clearly will not be picked up. Cishek’s overall numbers with the South Siders aren’t great — a 5.40ERA and 21-to-9 K/BB ratio in 20 innings — but he’s pitched pretty well since an awful start to the year. Over his past dozen outings, he’s pitched 11 2/3 innings while allowing four runs on 10 hits and five walks with 14 punchouts.

Recent uptick notwithstanding, the Sox feel that both Bummer and Rodon represent better postseason options, it seems. With four days of the regular season left, this move seems likely to put an end to Cishek’s 2020 campaign, although it’s technically feasible that he could be quickly outrighted to the Sox’ alternate site and selected back to the roster in the event of an injury.

Detwiler, 34, was an early surprise for the Sox, rattling off 12 1/3 shutout frames across his first nine appearances of the season. The well-traveled southpaw punched out 10 hitters and walked none in that time, although the complete absence of and a .138 BABIP each looked quite unsustainable. Detwiler has yielded seven runs (only five earned) on eight hits and five walks in the 7 1/3 subsequent innings — with two of those hits clearing the fence for home runs. He carries a sharp 3.20 ERA and 3.89 FIP on the season as a whole, but that’s been his only real success at the MLB level since 2014.

Both Bummer and Rodon will join the bullpen for a Sox club that has lost its grip on the AL Central lead, now sitting a half game back of a Twins team it topped thrice in last week’s best-of-four series. Healthy versions of Bummer and Rodon would surely help their cause. The former established himself as a breakout bullpen star for the Sox just last year, firing 67 2/3 frames of 2.13 ERA ball with a 60-to-24 K/BB ratio. That showing earned him a five-year, $16MM contract extension with a pair of club options over the winter.

Rodon, the former No. 3 overall draft pick, was once viewed as a foundational piece for the Sox’ rotation but has seen his career slowed by Tommy John surgery and shoulder troubles. Of Rodon’s 95 career appearances at the MLB level, all but three have been starts. However, given the missed time in 2020, it’s unlikely he could be built back up to take a rotation spot. He could conceivably be a multi-inning relief weapon for skipper Rick Renteria in the playoffs, but we’ll first see how he looks in his return to game action over the next four days.

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Chicago White Sox Newsstand Transactions Aaron Bummer Carlos Rodon Ross Detwiler Steve Cishek

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White Sox Injury Updates

By TC Zencka | September 12, 2020 at 10:07am CDT

The Chicago White Sox are right in the thick of a three-headed teeth-clenching battle for the AL Central division lead. Their 28-16 record – good for a .636 winning percentage – not only has them on pace for 103 wins over a full 162-game season, but it places them a game ahead of the Twins for the division crown with a 2 1/2 game cushion over the Indians.

When it became clear that Luis Robert would start the season with the big league club, expectations rose for the southsiders, but few expected them to make a run for the division lead. Robert, as the brightest star in a shimmering youth movement, has done his part to rise the club’s profile and competitive level with a triple slash of .260/.324/.526 with stellar and eye-catching defense in center.

But beyond the youth movement, Chicago has enjoyed relatively sound health this season from their core producers. Dallas Keuchel’s back issues have put a bit of a damper of that storyline, but he’s hoping to return to start Thursday’s game. Carlos Rodón, however, has been a perennial injured list denizen since making his big-league debut in 2015. The 27-year-old made it back to the bump for two rusty outings early this season before returning to the training room with shoulder soreness. Soreness in his back and ribcage area has kept him out further, but he’s nearing full health.

Rodón plans to throw off a mound as early as Monday in the hopes of returning to the active roster this season, per The Athletic’s James Fegan (via Twitter). This late in the season, especially after such a prolonged absence, means that Rodón is unlikely to reclaim a spot in the rotation. Lucas Giolito has his rotation spot on lock, and Keuchel will be right behind him if he can stay healthy. Dylan Cease, Dane Dunning, Gio Gonzalez, and Reynaldo Lopez are all auditioning to make the playoff rotation. There may be space for Rodón in the bullpen, however.

Manager Rick Renteria may soon have a couple more southpaws at his disposal. After establishing himself as one of the premier worm killers in the game last season, Aaron Bummer has made just 7 appearances this season – strong as they may be. Bummer holds a 1.23 ERA/1.55 FIP over 7 1/3 innings with an absurd 78.6% groundball percentage. It’s a small sample but Bummer also struck out 12 batters in that span, good for 14.73 K/9. Bummer has twice been placed on the injured list with a left biceps strain, but his recovery remains on track. If all continues as planned, Bummer should be able to join the team in time for their final road trip that takes them through the state of Ohio for series with the Reds and Indians, per MLB.com’s Scott Merkin (via Twitter).

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