Shuster will work as the opener Friday in Baltimore, Scott Merkin of MLB.com reports.

The game got pushed up a few hours due to inclement weather, so Shuster is going to give primary pitcher Sean Burke more time to get ready. Shuster has been back and forth between Triple-A and the majors a couple times this month, and he has a 1.93 ERA, 1.71 WHIP and 3:2 K:BB in 4.2 innings over his three most recent appearances with the big club.

Castro is out for the season due to a right knee injury, Jesse Rogers of ESPN.com reports.

Castro injured his right knee as he slipped while trying to cover first base against the Mets on Wednesday. He had to be removed from the game as he was helped off the field by trainers, but the injury was initially tabbed as soreness. The specifics of the injury are yet to be disclosed, but he won't retake the mound for the White Sox in 2025.

Burr (shoulder) received a cortisone injection Thursday to help treat his right shoulder inflammation, Arden Zwelling of Sportsnet.ca reports.

Burr was pulled off his rehab assignment Monday after experiencing a setback in his recovery, and he'll now be shut down from throwing for a few days following the injection. A clearer return timeline for the right-hander may emerge once he gets the green light to start building back up.

The Mariners optioned Castano to Triple-A Tacoma on Thursday.

Castano joined the Mariners' bullpen after being called up May 23 and made his MLB debut May 28. It was the lone appearance he made as he allowed three earned runs on three hits and two walks across three innings of relief. As a corresponding move Thursday, Casey Lawrence was selected from Triple-A Tacoma

The Mariners selected Lawrence from Triple-A Tacoma on Thursday.

Lawrence was outrighted to Triple-A Tacoma on May 23 after losing his roster spot two days prior. He did not make any appearances for Tacoma after being sent down as his last appearance was May 20 for the Mariners against the White Sox. In that outing, the 37-year-old tossed five innings in which he allowed an earned run on six hits. In other moves Thursday, Seattle optioned Blas Castano to Triple-A Tacoma and designated Blake Hunt for assignment.

The Guardians claimed Krook off waivers from the Athletics on Thursday and optioned him to Triple-A Columbus, Tim Stebbins of MLB.com reports.

Krook was pushed off the Athletics' 40-man roster Tuesday after allowing two runs in 3.1 innings. He owns a 3.21 ERA in 14 Triple-A frames this season, however, and he'll now attempt to work his way back into the big leagues with Cleveland. Ben Lively (elbow) was transferred to the 60-day IL to make room for Krook on the 40-man.

Anderson re-signed Wednesday with the Angels on a minor-league contract.

After the Angels designated him for assignment last weekend, Anderson elected free agency upon clearing waivers. He quickly linked back up with the Angels on a new minor-league deal and will presumably head back to Triple-A Salt Lake, where he had been working out of the rotation before being promoted to the big leagues May 9. Over his five appearances out of the Angels bullpen, Anderson turned in a 6.30 ERA, 1.70 WHIP and 10:3 K:BB in 10 innings.

The Rays optioned Seabold to Triple-A Durham on Thursday.

He'll give up his spot in the Tampa Bay bullpen to right-hander Kevin Kelly (glute), who was reinstated from the 15-day injured list. After getting a call-up from Durham on May 9, Seabold made just two relief appearances for the Rays and gave up an earned run on six hits and one walk over 3.2 innings.

The Rays reinstated Kelly (glute) from the 15-day injured list Thursday.

Tampa Bay optioned right-hander Connor Seabold to Triple-A Durham to make room in the bullpen for Kelly, who had been on the shelf since April 11 due to a left gluteal strain. Kelly proved his health during a three-appearance rehab assignment in the minors and should step into a middle-relief role for Tampa Bay.

Schultz gave up one hit and struck out four over 2.2 scoreless innings in Wednesday's 2-0 win over the Rangers.

Making his first career big-league start, Schultz lasted 45 pitches (28 strikes) before turning the ball over to Eric Lauer and the Blue Jays bullpen to complete a combined shutout. Schultz's 2.03 ERA through 13.1 innings with Toronto this season is a bit misleading -- he gave up four unearned runs May 25 against the Rays -- but his 17:3 K:BB and 0.98 WHIP are just as impressive. The 27-year-old rookie might head back to Triple-A Buffalo once the staff gets healthier, but Schultz is making a strong case to stick around in a long-relief or swingman role.