Here are three things we’ll be keeping an eye on around the baseball world throughout the day today:

1. Players on Waivers:

The trade deadline has come and gone, and the most significant way for clubs to improve their roster or add depth has come off the table. There are still some ways to acquire players after the trade deadline, however, and one in particular appears to be in full swing at this point: the waiver wire. Players must be part of an organization prior to September 1 in order to be eligible to play in the postseason, and in recent years that’s led non-contending clubs to place a number of their players on waivers during the final weeks of August in order to make them available to contenders in exchange for salary relief.

Currently, Rockies southpaw Austin Gomber and Marlins righty Cal Quantrill are both known to be on waivers. Perhaps a contender in need of starting depth will take on the remainder of one of those salaries in order to bring either Gomber or Quantrill into their organization, though it’s also possible they go through waivers unclaimed and simply remain with their current clubs. Over the coming days, it’s likely that teams will put a number of other veterans on expiring contracts through the waiver process. In an original piece for Front Office subscribers yesterday, MLBTR’s Anthony Franco discussed 17 players across seven different organizations who could be placed on waivers before the end of the month.

2. Series Preview: Red Sox @ Yankees

One of baseball’s oldest rivalries is gearing up for a four-game set this weekend as the Red Sox head to the Bronx. The Yankees have been on a roll lately with five consecutive wins, while Boston’s scuffled lately with three straight losses and and a 3-7 record in their last ten games. The Red Sox have plenty of motivation to try and turn things around while they’re at Yankee Stadium, however, as the two clubs are rivals not only in the AL East (where both teams trail the Blue Jays by a significant margin) but also in terms of Wild Card positioning. While the Yankees are currently in the top Wild Card spot, the Red Sox are in a more precarious situation with just a half-game lead over the Mariners for the second of three Wild Card spots and just a three-game buffer between themselves and the Royals.

Game 1 of the set will begin tonight with Lucas Giolito (3.63 ERA in 19 starts) on the mound for Boston opposite reigning AL Rookie of the Year Luis Gil (5.14 ERA in three starts). Game 2 of the series pits Yankees ace Max Fried (3.26 ERA) against Boston youngster Brayan Bello (3.23 ERA), while Game 3 will see Red Sox ace Garrett Crochet (2.43 ERA) square off against Yankees rookie Will Warren (4.25 ERA). Boston has not announced their starter for Sunday’s series finale, but that pitcher will face veteran lefty Carlos Rodon (3.25 ERA).

3. Kim day-to-day:

As noted by Marc Topkin of the Tampa Bay Times, Rays shortstop Ha-Seong Kim was scratched from yesterday’s game due to low back tightness. Kim made a name for himself with the Padres thanks to Gold Glove caliber defense all over the infield that he combined with average to slightly above average offense and impressive stolen base totals. That led the infielder to sign a two-year, $29MM deal with the Rays this past offseason that affords him the opportunity to opt out following the 2025 campaign, but he’s made it into just 23 games due to rehab from offseason shoulder surgery and back issues.

It’s unclear if Kim will require a stint on the injured list due to this latest ailment, but with no additional infielders on the 40-man roster besides those already on the active roster the club will likely need to select someone from the minors if Kim does head to the injured list. Topkin suggests that utility infielder Coco Montes is perhaps the most likely replacement for Kim in that case, though top prospect Carson Williams would be a far more exciting possibility.

Here are three things we’ll be keeping an eye on around the baseball world throughout the day today:

1. Messick to make MLB debut:

The Guardians are bringing southpaw Parker Messick up to the majors for his MLB debut today. The club’s second-rounder back in 2022 has climbed the minor league ladder fairly quickly to emerge at Triple-A this year, where he’s posted a solid 3.47 ERA and 29.1% strikeout rate across 98 2/3 innings of work. Those are impressive numbers for the 24-year-old, and now he’ll get the opportunity to see if his high strikeout rate can translate into the majors. The Guardians have managed to hang around the AL Wild Card picture despite soft selling this summer, but with Shane Bieber in Toronto and Tanner Bibee in the midst of a tough season they’ll need contributions from young arms like Messick if they’re going to stay relevant down the stretch.

2. Harper, Castellanos race towards milestone:

Phillies veterans Bryce Harper and Nick Castellanos are both a considerable way into their respective careers at this point. While Harper’s status as a two-time MVP far eclipses Castellanos’s resume as a two-time All-Star, both have had impressive careers where they’ve generally served as above-average hitters across their combined 27 years in the major leagues. Now the two teammates are chasing the same milestone: 400 career doubles. They’ll likely become the 199th and 200th players in MLB history to reach that benchmark in the coming weeks, as Harper currently sits at 397 career doubles while Castellanos sits just one behind him at 396 two-baggers for his career. The pair will look to tee off of Mariners right-hander Luis Castillo (3.48 ERA) as the Phillies go for the sweep against Seattle this afternoon.

3. Royals pushing for Wild Card spot:

Kansas City made the somewhat surprising decision to buy at the trade deadline despite being slightly below .500 at that point and on the periphery of the AL Wild Card race, but that decision is paying off to this point. An 11-6 record in the month of August has put them just 2.5 games back of the Red Sox and Mariners in the race for a playoff spot with a 65-61 record. Deadline additions have improved the club considerably, with Randal Grichuk, Adam Frazier, and Mike Yastrzemski all injecting life into a previously weak offense while Ryan Bergert has settled in as a quality rotation arm with a 2.70 ERA in three starts for the club. Today they’ll go for their second consecutive series sweep when they face the Rangers and an as-of-yet unannounced starting pitcher. Whoever starts for Texas will have to contend with rookie Noah Cameron, who has a 2.47 ERA in 17 starts.

Here are three things for MLBTR readers to watch out for throughout the day:

1. Alvarado to return:

Phillies southpaw Jose Alvarado served the 80th game of his PED suspension yesterday, meaning he’s set to be activated for today’s game against the Mariners. While Alvarado won’t be eligible to participate in the postseason, if he can continue to produce anything close to the 2.70 ERA with a 29.8% strikeout rate and 1.84 FIP that he posted in 20 innings of work prior to his suspension back in May, he’ll be a major asset to the Phillies’ bullpen down the stretch. Alvarado will join what’s become a fearsome back of the Phillies bullpen after the club picked up Jhoan Duran and David Robertson to complement Orion Kerkering and Matt Strahm. That deep bullpen mix should serve the Phillies well as they look to wrap up the NL East and angle for a bye through the Wild Card round of the playoffs. Corresponding moves to accommodate Alvarado’s addition to both the active and 40-man rosters will be necessary before he can be activated.

2. Guerrero to undergo MRI:

The AL-leading Blue Jays suffered a major scare yesterday when star first baseman Vladimir Guerrero Jr. exited the team’s loss against the Pirates due to a hamstring injury. As noted by MLB.com’s Keegan Matheson, Guerrero is set to undergo an MRI to determine the severity of the issue. Matheson adds that the MRI seems to be viewed as “precautionary” at this point.

With just six weeks left in the regular season, it would be understandable if Toronto exercised an abundance of caution with the face of their franchise and sent him for a brief stint on the injured list rather than risk letting him play through the issue and further aggravating the hamstring. Ty France and Joey Loperfido are among the club’s potential first base options to fill in for Guerrero in the event that he misses time.

3. MLBTR Chat today:

The trade deadline is in the rearview mirror, and the stretch run has officially begun. There is no shortage of close postseason races, and it’s never too early to look ahead to the offseason and what free agency and the winter trade market might bring. MLBTR’s Steve Adams will be hosting a live chat this afternoon at 1pm CT to discuss it all. You can click here to ask a question in advance, join in live once the chat begins, or read the transcript once the chat is complete.

Here are three things we’ll be keeping an eye on around the baseball world throughout the day:

1. Red Sox roster moves incoming:

The Red Sox are nearing a deal with first baseman Nathaniel Lowe, who was designated for assignment by the Nationals last week. Once that deal is finalized, the Red Sox will need to make corresponding moves in order to accommodate the addition of Lowe to both the club’s 40-man and active rosters. That 40-man move could simply come by way of transferring infielder Marcelo Mayer to the 60-day injured list after yesterday’s announcement that he’ll miss the remainder of the season due to wrist surgery, but it’s also worth noting that bench bats like Abraham Toro and Ali Sanchez, whose roster spots could be at risk with Lowe set to join the club, do not have options remaining and would need to be designated for assignment if removed from the roster.

2. Series Preview: Brewers @ Cubs

The Brewers just saw their incredible 14-game winning streak come to an end, but they still hold an eight-game NL Central lead thanks to excellent pitching and timely hitting — not only from regulars like William Contreras and Christian Yelich but also surprise heroes like Andruw Monasterio. Their win streak has coincided with some weak play from the Cubs, who have scuffled to a 6-8 record so far in August and a 12-14 record since the All-Star break. Kyle Tucker and Pete Crow-Armstrong aren’t hitting like the superstars they were in the first half, and the bullpen has begun to show cracks after being carried by unexpected contributors like Brad Keller and Drew Pomeranz earlier this summer.

That leads into what could be the biggest series of the regular season for both clubs, with the Brewers headed to Wrigley Field for five games in four days — starting with a doubleheader today. Cade Horton (3.07 ERA in 16 outings) will face off against Freddy Peralta (2.90 ERA in 25 starts) in Game 1, followed by a second game with two as-of-yet unannounced starters. Tuesday’s game will feature southpaw Matthew Boyd (2.46 ERA in 24 starts) against longtime Brewers ace Brandon Woodruff (2.06 ERA in seven starts). The Brewers are slated to start rookie Jacob Misiorowski (3.89 ERA in eight starts) and righty Quinn Priester (3.48 ERA in 23 outings) for Games 4 and 5. Chicago has not yet announced its starters for those games. Former Brewer Colin Rea and ace Shota Imanaga would be on schedule, but the impending return of Jameson Taillon from the injured list could impact the club’s rotation at some point this week.

3. Pitchers’ Duel in Philadelphia:

The Mariners are in Philadelphia, and the their series against the Phillies will kick off with a particularly exciting pitching matchup. Seattle ace Logan Gilbert is scheduled to take the mound today amid a season where he’s posted a 3.31 ERA with a career-best 2.99 FIP across 17 starts. The Phillies counter with southpaw Ranger Suarez, who’s having a strong year himself ahead of reaching free agency this winter. Suarez sports a 3.28 ERA and 3.27 FIP across 18 starts, though he’s had a rough patch of late (6.59 ERA over his past five starts). With the Mariners just 1.5 games back of the Astros in the AL West and the Phillies tied with the Dodgers for the second playoff bye in the NL, it’s a high-stakes game — and series — for both clubs.