Holton will serve as the Tigers' opening pitcher for Tuesday's game against the Red Sox, Cody Stavenhagen of The Athletic reports.

Holton is poised to work the first inning or so before presumably turning the ball over to Keider Montero, who is in line be deployed as the primary pitcher for Tuesday's clash. Holton has been knocked around lately, posting a 4.70 ERA and 1.43 WHIP with eight strikeouts over his last 7.2 innings of work (six appearances).

Otanez (shoulder) struck out three and allowed two hits and no walks over two scoreless innings in his rehab appearance Sunday with Triple-A Las Vegas.

Otanez has been on the shelf all season due to a right shoulder sprain, but he appears to be on the cusp of a return from the 15-day injured list. After he was briefly shut down following an April 26 rehab appearance with Single-A Stockton, Otanez headed to Las Vegas earlier this month and has made four appearances for the Triple-A club over the past week. Otanez is likely to fill a middle-relief role for the Athletics once activated.

McFarland (groin) is scheduled to undergo an MRI on Monday, MLB.com reports.

McFarland sustained a left groin injury while covering first base on an Austin Wells groundout in Sunday's 12-2 loss to the Yankees. The MRI should shed light on the extent of the groin issue and will likely determine whether McFarland requires a stint on the injured list. The veteran southpaw reliever has notched five holds and has turned in a 5.23 ERA and 1.74 WHIP over 18 appearances with the Athletics this season.

Yarbrough (1-0) got the win Sunday against the Athletics, allowing two runs on six hits and a walk while striking out two over five innings.

Yarbrough made it once through the order without any damage, but the Athletics tacked on a run in the fourth on a trio of base hits before JJ Bleday led off the fifth with a solo blast to right field. Yarbrough's day ended at 67 pitches, and it was his first time reaching five innings in an outing since Aug. 22 of 2024. Yarbrough's next appearance may be back out of the bullpen, as the Yankees could go back to a four-man rotation this week if they choose. The 33-year-old lefty now owns a 3.70 ERA, 1.27 WHIP an 20:10 K:BB in 24.1 innings this year.

Lauer (1-0) allowed a hit and a walk while striking out five over 4.2 scoreless innings to earn the win Sunday over the Mariners.

Jose Urena started, but he covered two innings and was pulled after giving up a solo home run to Dylan Moore to lead off the third. Lauer then took over and threw over twice as many pitches as Urena (63 to 31). Lauer has made two bulk-relief appearances and one as a more traditional reliever. While Urena appears to officially have a spot in the rotation, Lauer has also been kept on a starter's schedule since his April 30 season debut. The situation is fluid for now, and it wouldn't be surprising to see Lauer eventually get a start since he has history in that role in his previous major-league stops with Milwaukee and San Diego.

Tonkin (shoulder) has developed biceps tendinitis during his rehab assignment and will receive an injection, MLB.com reports.

It's not clear what treatment he'll receive for the tendinitis, but this will be a significant setback. He was nearing the end of his 30-day rehab stint in the minors, so he'll need to start the process again when healthy. Tonkin suffered a right shoulder strain early in spring training and began the season on the injured list. He had made six rehab outings before developing the biceps issue.

Chapman earned the save in Sunday's 3-1 win over the Royals, allowing one hit in a scoreless ninth inning.

Chapman was called upon to face the heart of the Royals' order and worked around an error and a single to secure his sixth save in as many chances. The veteran closer has been outstanding so far this season, posting a 1.88 ERA, 0.98 WHIP and 20:5 K:BB across 14.1 innings.

Booser threw a perfect ninth inning to earn a save against Miami on Sunday.

Booser needed only six pitches (five strikes) to retire the Marlins' 8-9-1 hitters in Sunday's win. It was his first save of the season after picking up his first win of the year Friday against Miami. He now owns a 4.80 ERA with a 15:8 K:B across 15 innings. Two of Booser's last three appearances have been save opportunities, and the White Sox's closer role still appears to be very fluid.

McFarland exited Sunday's 12-2 loss to the Yankees in the top of the eighth inning due to a left groin injury, Martin Gallegos of MLB.com reports.

McFarland suffered the groin injury while covering first base on a groundout by Austin Wells. Wells was the only batter McFarland faced before exiting the contest. The Athletics are likely to send McFarland in for more tests Monday before determining whether his groin issue is significant enough to force him to the injured list.

Walters (undisclosed) was reinstated from Triple-A Columbus' 7-day injured list and returned to action Saturday, walking one batter over a scoreless inning of relief.

Walters hadn't pitched for Louisville since April 16 due to an unspecified injury but was cleared to rejoin the Guardians' top affiliate without requiring a rehab assignment beforehand. The righty reliever spotted 13 of his 18 pitches for strikes in the appearance and averaged 96.9 miles per hour with his fastball.