White Sox Designate Lucas Sims For Assignment
The White Sox shuffled up their bullpen Thursday, announcing that veteran righty Lucas Sims has been designated for assignment. Right-hander Tyler Davis has had his contract selected from Triple-A Charlotte and will join the big league relief corps.
Sims, 32 next month, pitched 10 innings for the South Siders prior to this morning’s DFA. He was tagged for seven runs (five earned) on nine hits, seven walks and a hit batter. He fanned 10 of his 46 opponents (21.7%), but his perennially spotty command also led to 17.4% of his opponents reaching base without even needing to put a ball in play.
The White Sox added Sims on a minor league deal over the winter. He had a nice spring, firing six shutout innings with three hits, three walks and eight strikeouts, but didn’t make the Opening Day roster. He began the season in Charlotte and tossed a scoreless frame before being selected to the majors when the Sox parted ways with Rule 5 pick Jedixson Páez.
A veteran of 10 partial major league seasons, Sims has more than six years of service time. He was a useful middle relief and eventual setup arm at his peak in Cincinnati, pitching to a combined 3.93 ERA in 183 1/3 innings from 2019-23. Sims punched out a hearty 31.9% of opponents in that time but was far too prone to free passes, issuing walks at a 12.2% clip.
Sims collected 39 holds and four saves in 2023-24, but a 2025 stint with the Nationals saw his shaky command erode to untenable levels. Sims walked more than 19% of his opponents (14 of 72) and plunked another seven batters before being cut loose in Washington. This year’s command was better than that low point, but Sims has walked or plunked more than 15% of the 1429 batters he’s face in the majors. It’s unlikely he’ll ever end up with even average command over a sample of any note.
The White Sox will have five days to trade Sims or place him on outright waivers. If they go the waiver route, that’d be an additional 48-hour process, meaning his DFA will be resolved within a maximum of one week.
As for Davis, he’ll be making his major league debut the first time he takes the mound. The 27-year-old was never drafted, instead signing with the Sox out of the independent Pioneer League in 2024, when he played for the Oakland Ballers. He’s a Sam Houston State product who’s pitched 103 innings in pro ball since signing. In that time, Davis has logged a 3.41 earned run average with a 27.1% strikeout rate and 12.4% walk rate.
Davis has some experience as a first baseman as well, having worked as a two-way player in college. However, he’s focused solely on pitching in affiliated ball and will come to the ChiSox with a four-seamer that’s been sitting 96.4 mph in Triple-A, a splitter that’s averaged 86.2 mph and a slider at nearly the same velocity as that split.
Phillies Release Taijuan Walker
The Phillies have released veteran right-hander Taijuan Walker, per a club announcement. Philadelphia also optioned right-hander Alan Rangel to Triple-A Lehigh Valley and recalled right-hander Nolan Hoffman. It seems there’ll be another move before today’s game to fill the 26th spot on the roster.
Walker, 33, is in the final season of a four-year, $72MM contract that didn’t pan out at all as the team hoped. It was a surprisingly large contract at the time he signed the deal. Walker was fresh off a solid 29-start showing with the Mets (3.49 ERA, 157 1/3 innings), but his rate stats didn’t support that level of run prevention. Walker had a decent season as an innings eating, back-of-the-rotation starter in year one of the contract (4.38 ERA, 172 2/3 frames), and he posted solid results between the rotation and bullpen in 2025 as well (4.08 ERA, 123 2/3 innings).
The other two seasons of the contract have been a nightmare. Walker was one of the least-effective pitchers in the sport in 2024, yielding a 7.10 earned run average across 83 2/3 innings. This season has gone even worse. The veteran righty has pitched 22 2/3 innings and been shelled for 25 runs (23 earned) on a whopping 36 hits and 11 walks with only 17 strikeouts. He’s working with the second-worst velocity of his career — ahead of only that disastrous ’24 campaign — and missing bats at his lowest levels ever. Between those red flags and the 9.13 ERA, the Phillies were left with little choice but to move on as they try to crawl out of an 8-16 hole and snap a woeful eight-game losing streak.
The Phillies will remain on the hook for the rest of Walker’s $18MM salary this season. He’s still owed a bit more than $15MM of that sum. Any team that signs Walker would owe him only the prorated league minimum for any time he spends on said club’s major league roster or injured list. That amount would be subtracted from what the Phillies owe, but they’re paying the vast majority of the tab even in a best-case scenario.
Ace Zack Wheeler will return to the Phillies’ rotation this weekend, though it’s anyone’s guess how he’ll perform on the heels of a procedure to address thoracic outlet syndrome. He’s posted a 5.85 ERA in 20 minor league rehab innings, albeit with more encouraging rate stats: 28% strikeout rate, 6.1% walk rate, 45.1% ground-ball rate. Wheeler will join last year’s Cy Young runner-up, Cristopher Sánchez, longtime top prospect Andrew Painter, and veterans Aaron Nola and Jesús Luzardo in the Philadelphia rotation.
All told, Walker ends up with 402 2/3 innings of 5.12 ERA ball as a member of the Phillies. He now becomes the second high-priced veteran whose contract will effectively be eaten by the Phillies this season. Outfielder/designated hitter Nick Castellanos was also cut loose from the final season of a five-year, $100MM contract just prior to spring training. He’s since signed with the Padres, for whom he’s batting .146/.196/.208 in 51 plate appearances. As with Walker, the Phillies are paying the vast majority of Castellanos’ $20MM salary. The Padres only owe him the prorated minimum for any time spent in the majors.
Braves Select Carlos Carrasco, Place Dylan Dodd On Injured List
April 23: Atlanta formally announced the selection of both Carrasco and Ritchie. Fuentes was indeed optioned back to Gwinnett, and Dodd heads to the 15-day injured list. However, Dodd’s formal injury designation from the team was not an oblique strain, but rather “left thoracic spine inflammation.” The team’s initial announcement doesn’t provide a timetable for Dodd’s return, but manager Walt Weiss will probably provide more details in today’s pre-game media session.
April 22: The Braves are selecting veteran righty Carlos Carrasco onto the MLB roster, reports Mark Bowman of MLB.com. Left-hander Dylan Dodd will go on the 15-day injured list with an oblique strain. Carrasco will be available in long relief behind JR Ritchie, who is coming up to start tomorrow in his major league debut.
Atlanta already had two openings on the 40-man roster. They lost Osvaldo Bido on waivers to the White Sox over the weekend and designated Ian Hamilton for assignment this morning. Adding Ritchie and Carrasco will put their roster back at capacity.
The 39-year-old Carrasco will be in the big leagues for a 17th season. He made three starts for Atlanta last summer as part of a revolving door of depth arms while the rotation was decimated by injury. Carrasco allowed 15 runs across 13 2/3 innings and finished the season in Triple-A. The Braves brought him back on a new minor league deal at the beginning of the offseason.
Carrasco is out to a nice start with their top affiliate in Gwinnett. He carries a 1.71 earned run average through his first four appearances. Carrasco has fanned 21% of opposing hitters with a sub-6% walk rate. He’s only in the 90-91 mph range on his fastballs, leaning more heavily on his slider and changeup to compensate.
The arsenal hasn’t played at the MLB level for the past few seasons. Carrasco owns a 6.36 ERA between four teams since the start of the 2023 campaign. Atlanta needed a length option for a bullpen that has gotten a lot of work over the past couple days.
Their last two starters, Reynaldo López and Didier Fuentes, threw a combined four innings. While Ritchie is a very good prospect, he’s not a lock to work deep in the game in his first outing against a big league lineup. He’ll take on a Nationals team that has started the season hot offensively behind fantastic months from James Wood and CJ Abrams. Excluding the just optioned Fuentes, Ritchie and Carrasco have been Atlanta’s two best Triple-A starters.
Padres Sign Lucas Giolito
Lucas Giolito‘s protracted 2025-2026 free agency stint has finally ended. The Padres announced that they have signed him to a one-year deal with a mutual option. He’ll receive a $3MM guarantee, with half of that total via buyout on a 2027 mutual option worth $8MM. Giolito can increase the buyout by $3MM based on starts in 2026. There is an additional $2MM in unlockable bonuses tied to awards voting. To make room on the 40-man, the Padres announced that righty Bryan Hoeing has been transferred to the 60-day IL as he recovers from flexor surgery. Giolito will start with Single-A Lake Elsinore and must be on the major league roster within the next 25 days. Giolito is represented by CAA Sports.
For Giolito, his second foray into free agency was not nearly as successful as his first. His 2019 to 2021 run with the White Sox had him positioned as a top-of-the-rotation arm. Among 46 starters who threw at least 350 innings in that time frame, Giolito was sixth with a 30.7% strikeout rate on the back of a fantastic fastball-changeup pairing. His propensity for fly balls (41.7 FB%) and homers (13.7 HR/FB%) possibly prevented “ace” designation, yet Giolito was easily one of baseball’s best pitchers in this time frame.
However, more middling results followed in 2022 and 2023, with the homers especially ticking up in 2023. His 41 big flies were second only to Lance Lynn. Despite a poor platform year by his standards, Giolito and his representatives were able to parlay the showing into a $38.5MM guarantee with the Red Sox over the ’24-’25 seasons, with some additional incentives and player option structure.
Unfortunately, a torn UCL brought his 2024 season to an abrupt halt. An internal brace procedure (which carries a shorter rehab timeline than a traditional Tommy John ligament graft) had him back on the mound at the end of the following April, where he threw 145 innings. ERA evaluators/predictors like xFIP (4.59) and SIERA (4.65) were more bearish on his work than his actual results (3.41). Notably, Giolito’s strikeouts were down from his heyday with the White Sox. He profiled more as a back-of-the-rotation starter than the tremendous upside he flashed from 2019-2021 with Chicago.
Despite a solid return to the rotation, Giolito suffered from flexor irritation and a bone issue at the conclusion of the 2025 season. Although he was set to return to the club after resting, the Red Sox’s early postseason exit meant Giolito had no chance to pitch again before free agency. Under the hood, Giolito looked like a muted version of his best days, but he was a perfectly adequate starter in 2025.
His fastball velocity checked in about a one mile per hour (93.3) lower than his best seasons with the White Sox (94.2), but this was a continuation of a trend started in 2022. Among 82 pitchers who tossed at least 140 innings last season, Giolito was 69th in K-BB%, indicating both below-average ability to miss bats and control the zone. However, he was able to limit homers more effectively than ever before: his 9.3 HR/FB% was below league average, and the first time he recorded a single-percentage mark in a season of 25 or more starts.
Giolito declined his end of a $19MM mutual option (essentially a formality) with the Red Sox for 2026, and it perhaps came as no surprise that the Red Sox passed on extending Giolito a qualifying offer after the 2025 season due to some lingering injury trepidation. He is the last of the MLBTR 2025-2026 Top 50 MLB Free Agents to sign, and comes in far below expectations in years and total guarantee. Even without draft pick compensation attached, Giolito sat on the free agent market well into April, despite some notable playoff aspirants like the Braves, Cubs, and Padres losing multiple starters during Spring Training and the early season.
Speaking of the Padres, the news couldn’t come at a better time. Injuries and slowed recoveries have decimated the top of the rotation over the past few months. Yu Darvish had his second UCL surgery after the playoffs concluded in early November. Darvish is currently rehabbing on the restricted list away from the team and has reportedly considered retirement. Joe Musgrove, recovering from his own Tommy John surgery back in October 2024 and expected to open the season in the rotation, has had his rehab interrupted and was placed on the IL to open the season. 2025 workhorse Nick Pivetta hit the IL after four starts with a flexor strain. Surgery is not currently on the table, but given the recurrence of the strain (Pivetta also hit the IL for a short period in 2024 with the same issue), the Padres will give Pivetta ample time to rest his ailing arm in the hopes of having him available for a postseason run.
These injuries have thinned the depth of the rotation considerably in San Diego. Juan Soto trade returns Michael King and Randy Vasquez are providing quality innings, but the back of the rotation has shown mixed results to this point. Walker Buehler, though a far cry from his Dodgers’ peak, is looking like he still might have something left in the tank. Former Rockies All-Star German Marquez has a 3.86 ERA but less exciting numbers under the hood. Knuckleballer Matt Waldron was hit hard in his 2026 debut.
All three back-end starters have struggled to give the Padres consistent innings at the back of the rotation. Seven of the Padres’ first 23 games have had a starter fail to record an out in the fifth inning. Though Griffin Canning is on the horizon while working through a Triple-A El Paso rehab, the Padres decided that it was worth fortifying the rotation depth for the summer ahead.
Giolito’s contract stipulation for a Major League recall within the next 25 days would put him in line for a mid-May debut. This should give him four turns through the rotation to build up his arm after missing all of Spring Training. Should the rotation remain healthy after Canning joins, the Padres will have some decisions to make. As MLB veterans with ample service time, Buehler and Marquez can’t be optioned without their consent. Someone may end up in the bullpen or pushed off the roster entirely, depending on future health.
For now, San Diego will be happy to kick the roster-crunch can down the road. It’s an affordable, low-risk signing of an MLB-quality arm that could help the team weather the injury storm. The deal is much in the vein of recent similar signings by PBO/GM A.J. Preller. Operating under some payroll constraints after the death of former owner Peter Seidler and the imminent sale of the club, Preller has prioritized creative, low-dollar guarantees to Pivetta, Marquez, Buehler, and now Giolito to minimize the CBT hit (the Padres are currently in the first luxury payor tier). For his part, Giolito gets the opportunity to pitch for a potential contender with a recent record of rehabilitating starting pitchers’ value as he looks to surpass his 2025 platform year for a better offer next offseason.
Jon Heyman of the New York Post was the first to report the $3MM guarantee and the $2MM in awards bonuses. Ari Alexander of 7News Boston WHDH had the $1.5MM salary and buyout on the $8MM mutual option plus the $3MM in escalators. Kevin Acee of the San Diego Union-Tribune had the details on the initial minor league assignment and recall stipulation.
Braves To Select JR Ritchie
The Braves are promoting pitching prospect JR Ritchie to start tomorrow afternoon’s game against the Nationals, reports Harrison Smajovits of Sports Illustrated. Mark Bowman of MLB.com reports that Didier Fuentes is being optioned back to Triple-A Gwinnett in the corresponding transaction. Atlanta will also promote Carlos Carrasco to work in long relief.
Fuentes was just recalled this morning. He started this evening but labored over three innings, allowing seven hits and a walk. Fuentes’ inefficiency forced the Braves to bring in Martín Pérez for long relief. The veteran southpaw tossed three innings of two-run ball, which obviously took him out of consideration to start tomorrow’s ballgame.
Atlanta needed a spot starter for the finale of their four-game set in Washington. Long relievers José Suarez and Dylan Dodd each pitched on Tuesday, and Dodd is reportedly going on the injured list. A bullpen game would have been a lot to ask. Reynaldo López only completed one inning last night, so every Braves reliever has pitched within the past two days.
Ritchie was the logical candidate to take the ball. The 2022 supplemental first-round draftee has been Gwinnett’s best pitcher in the early going. Ritchie has only given up three runs through his first 27 1/3 innings while striking out 26.2% of opposing hitters. He has tiptoed around erratic command, as he’s walked 13 batters and plunked four more.
Although the 22-year-old isn’t a finished product, he’s likely to be up and down throughout the season as a key rotation depth piece. Baseball America ranks Ritchie as the #2 prospect in the Atlanta system, crediting him with a deep arsenal and a chance to be a #4 starter. Ritchie has been in the 93-94 mph range with his four-seam fastball and sinker this season. He throws four distinct offspeed pitches — a changeup, cutter, slider and curveball.
It’s past the point at which Ritchie can reach a full year of service time in 2026. He was on the preseason Top 100 lists at each of BA, MLB Pipeline and ESPN. He therefore meets the threshold for the Prospect Promotion Incentive and could “earn” a service year if he finishes top two in Rookie of the Year balloting. The Braves would not receive an extra draft choice in that scenario because he wasn’t on the MLB roster for 172+ days.
There’s a decent chance this is a one-off appearance regardless. Ritchie will be the only healthy, optionable pitcher on their active roster aside from top setup man Dylan Lee. Atlanta has an off day on Monday. The Braves could option Ritchie after tomorrow’s appearance to get an extra bullpen arm up for their weekend series against the Phillies. Pérez would be ready to start in the middle of next week. Spencer Strider probably only needs one more rehab outing before he returns to the rotation.
Rangers Outright Marc Church
The Rangers announced Wednesday afternoon that they’ve outrighted reliever Marc Church to Triple-A Round Rock. He was designated for assignment last week when Texas called up Cal Quantrill and Gavin Collyer.
This is the first career outright for Church, who’ll stick in the organization without holding a spot on the 40-man roster. The Atlanta native was an 18th-round pick out of high school in the 2019 draft. Church received a $300K signing bonus that reflected a higher ceiling than his draft spot indicated. He developed into a reasonably promising bullpen prospect until injuries sidetracked him.
Church nabbed a 40-man spot following the 2023 season. He missed most of the following year with a rotator cuff strain. Church did get an MLB cameo in the final weekend of the ’24 campaign. He built that into an Opening Day bullpen spot a year ago but was optioned out after five appearances. Church spent much of the season on the minor league injured list for a second straight year. He battled elbow, oblique and lat issues before sustaining a teres major strain that bothered him this offseason.
Optioned back to Round Rock to open the ’26 season, Church has shown signs of rust. He has walked four batters and hit another over his first 4 2/3 innings. His stuff has still looked sharp, as he’s averaging 96 mph on his heater with an 86 mph slider. Church has also toyed with a changeup after rarely using it in previous seasons.
It’s moderately surprising that no other team was willing to take a flier on the stuff, though the league was evidently deterred by the recent health history. Church will try to iron out the command woes to put himself back on the radar in a Texas bullpen that again looks sharp despite being mostly patched together via modest free agent signings.
Marlins To Designate Austin Slater For Assignment
The Marlins are designating veteran outfielder Austin Slater for assignment, reports Craig Mish of SportsGrid. Esteury Ruiz has played four Triple-A games on a minor league rehab stint and will be activated for Friday’s series opener in San Francisco. Miami’s 40-man roster count will drop to 39.
Slater signed a $1MM free agent contract at the end of Spring Training. He had been in camp on a minor league deal with Detroit but didn’t crack their roster. The Fish wanted a righty-hitting platoon outfielder with Ruiz shelved by an oblique strain and starting left fielder Kyle Stowers down with a hamstring strain. Stowers returned over the weekend, and Ruiz’s forthcoming return pushes Slater off the roster.
It wasn’t a great showing for the 33-year-old Slater. He played in 12 games and collected just four hits, all of them singles. He took four walks but struck out nine times in 28 plate appearances. Slater has pinch hit a few times but hasn’t been in Clayton McCullough’s starting lineup since April 12. Heriberto Hernández gets some work as a righty-hitting left fielder. Utilityman Javier Sanoja can also play out there.
Ruiz, an offseason trade pickup from the Dodgers, adds a speed element off the bench. He hasn’t hit much in the big leagues but raked in Triple-A last year. Ruiz stole 67 bases for the A’s back in 2023, his only full season at the MLB level.
Miami has five days to trade Slater or place him on waivers. He has sufficient service time to decline an outright assignment and seems likely to be released.
Tigers Select Burch Smith
3:45pm: The Tigers have made the move official, announcing they have selected Smith and optioned De Jesus. Left-hander Bailey Horn was transferred to the 60-day injured list as the 40-man move. Evan Woodbery of the MLive Media Group reported the Horn move prior to the official announcement. Horn began the season on the 15-day IL while recovering from left elbow arthroscopy. He began a rehab assignment earlier this month and pitched on April 7th and 11th but that rehab was shut down. His 60-day count is retroactive to his initial IL placement, so he will be eligible for reinstatement in late May.
2:45pm: The Tigers are going to select the contract of right-hander Burch Smith. Left-hander Enmanuel De Jesus has been optioned to Triple-A Toledo in a corresponding active roster move. The Tigers will need to open a 40-man spot to make it official. Cody Stavenhagen of The Athletic was among those to relay that Smith had a locker in the clubhouse and that De Jesus has been optioned.
Smith, 36, signed a minor league deal with the Tigers in the winter. He has been with Triple-A Toledo to begin the season and has been off to a hot start. Through eight appearances and ten innings, he has allowed just two earned runs via four hits, no walks and one hit batter while striking out 16. He has been throwing his changeup 12.6% of the time in that small sample, after only using that pitch about 1-3% of the time in recent years.
The Tigers will give Smith a chance to face major league hitters for the first time since 2024. Though he is in his mid-3os and debuted in the majors over a decade ago, his big league track record is still pretty limited. At the end of 2021, he had 191 major league innings with a 6.03 earned run average. He spent 2022 in NPB in Japan and 2023 in the KBO in South Korea.
He was back in the majors with the Marlins and Orioles in 2024 and posted a 4.95 ERA in 56 1/3 innings. Last year, he was stuck in the minors with the Pirates after signing a minor league deal. He bounced on and off the injured list in the minors and put up a 7.08 ERA in Triple-A before being released in July.
Though Smith didn’t sign anywhere else in the latter months of 2025, the Tigers may have been intrigued by a stint in winter ball in the Dominican Republic. Pitching for Águilas Cibaeñas, Smith logged 15 1/3 innings with a 1.76 ERA. He struck out 20 of the 63 batters he faced, a 31.7% clip. He has carried over that form so far this year, with a 29% strikeout rate in spring training and a huge 44.4% clip in Triple-A.
If he provide something close to that in the majors, it would be a nice under-the-radar find for the Tigers. If not, Smith has at least five years of service time, meaning he can’t be optioned back to the minors without his consent.
Photo courtesy of Junfu Han, Imagn Images
Phillies Place J.T. Realmuto On Injured List
3:20pm: The Phillies have now officially announced Realmuto’s IL placement, listing his ailment as back spasms. To open a 40-man spot for Stubbs, right-hander Max Lazar has been transferred to the 60-day injured list. Lazar began the season on the 15-day IL due to a left oblique strain. His 60-day count is retroactive to the start of the season, so he can be reinstated in late May. He hasn’t yet begun a rehab assignment.
1:10pm: The Phillies are going to place catcher J.T. Realmuto on the 10-day injured list due to a lower back injury, reports Matt Gelb of The Athletic. Fellow catcher Garrett Stubbs will be selected to take Realmuto’s place on the active roster. A corresponding move will be required to open a 40-man spot for Stubbs.
Realmuto was removed from Saturday’s game due to lower back tightness. He sat out the contests on Sunday and Monday before rejoining the lineup on Tuesday, though Gelb notes the injury was still limiting him. It seems the Phils and/or Realmuto have decided that he needs to rest up, rather than try to play through the issue.
That’s probably a sensible decision in the long term but the timing is challenging for the Phillies. They are out to a brutal 8-15 start to the season. They would be the worst team in the majors if not for the Mets struggling even more. The offense has been a particularly weak part for Philly thus far, as they have only scored 80 runs. The Mets and Giants are the only MLB teams with fewer.
Losing Realmuto won’t help. He hasn’t been on fire this year but his .259/.344/.352 line translates to a 100 wRC+, indicating he’s been exactly league average. Catchers are usually about ten points below par, so that’s actually pretty solid production for a backstop. It also has value in the context of so many other hitters in the Philadelphia lineup struggling.
For at least ten days, the Phillies will go with the pairing of Rafael Marchán and Stubbs behind the plate. Marchán has been part of Philly’s catching mix for years, debuting back in 2020, but hasn’t been able to get much playing time behind Realmuto. He has just 271 big league plate appearances spread across the years, with a .223/.283/.364 line and 77 wRC+. That includes a brutal .065/.094/.161 line so far in 2026.
Stubbs has also been in the Philly catching mix for years but both he and Marchán were out of options coming into 2026. The club dabbled with Stubbs playing other positions in spring but ultimately made the decision to go with Marchán as the backup and push Stubbs off the roster. He cleared outright waivers, allowing the Phillies to keep him around as non-roster depth.
That has led to today’s return to the big leagues. He has an excellent .289/.413/.632 line in Triple-A this year, but in a tiny sample size of ten games and 46 plate appearances. In his major league career, he has stepped to the plate 521 times and produced a .215/.293/.310 line and 70 wRC+.
Stubbs and Marchán will try their best to cover for Realmuto’s absence but his IL stint will make it a bit harder for them to pull out of this early tailspin. Ideally, he will heal up and return after a minimal absence. As mentioned, both Stubbs and Marchán are out of options, so one of them will likely be pushed off the roster when Realmuto’s IL stint is done.
Photo courtesy of Kyle Ross, Imagn Images
Red Sox Select Eduardo Rivera
April 22: The Sox have made it official today, announcing they selected Rivera, optioned Anderson and put Casas on the 60-day IL. Chris Cotillo of MassLive confirmed the Casas move prior to the official announcement.
April 21: The Red Sox are promoting left-hander Eduardo Rivera, as first reported by Javier Sabath. The Sox will option righty Jack Anderson to Triple-A Worcester, according to Ari Alexander of Boston 7 News. They’ll also need to open a spot on the 40-man roster. Triston Casas stands as a 60-day injured list candidate after suffering an intercostal strain on top of his work back from knee surgery.
Rivera makes the jump directly from Double-A Portland. The 22-year-old southpaw dominated over his first two starts of the season. He recorded 16 strikeouts against three walks over 10 innings of one-run ball. Rivera also missed bats for his native Puerto Rico during the World Baseball Classic. He fanned nine hitters over 6 2/3 frames in two WBC games. Rivera allowed three runs on two hits, four walks, and a hit batter.
Listed at 6’7″ and 237 pounds, Rivera cuts an imposing figure on the mound. The long limbs have also contributed to strike-throwing issues in his minor league career. Rivera was an 11th-round selection by the Athletics in 2021. He never advanced out of A-ball in their system and was released in May ’24.
The Red Sox took a flier on his size and a fastball that runs into the mid-90s. They’ve been rewarded for the pickup, as Rivera has pitched well since joining the Boston organization. He combined for a 2.48 ERA while striking out 29.7% of batters faced over 87 innings between High-A and Double-A last season. That came with a near-13% walk rate, but Rivera has been around the strike zone over his first couple appearances this year.
Rivera did not crack Baseball America’s Top 30 prospects. However, MLB Pipeline slotted him #26 in the system with praise for his fastball-slider combination. Rivera probably projects to a bullpen role but is stretched out enough to work multiple innings.
The Red Sox used seven relievers to get through Monday’s game. Their leverage arms got a rest today, as the duo of Anderson and Tyler Samaniego finished the 4-0 loss to the Yankees. Rivera will replace Anderson as a potential mop-up arm. They’re carrying a ninth reliever for the next couple days after placing Sonny Gray on the injured list but will need to drop back to an eight-man bullpen to call up a starter (most likely Payton Tolle) this weekend.