The Angels placed Chafin on the 15-day injured list Friday, retroactive to Thursday, with left triceps inflammation.

Chafin has been effective out of the bullpen since joining the Angels at the trade deadline, posting a 1.98 ERA and 1.17 WHIP alongside an 18:7 K:BB over 13.2 innings. However, he'll now be unavailable for the next two weeks after coming away from his latest appearance with a triceps issue, leaving just enough time for him to potentially come back for the final weekend of the regular season. Connor Brogdon was selected from Triple-A Salt Lake to fill the opening in the Halos' bullpen.

The Mariners designated Castillo for assignment Friday.

Castillo's run with the Mariners will end after just nine days, during which he gave up one unearned run in three innings across three appearances. Casey Legumina will come up from Triple-A Tacoma to fill the vacancy in Seattle's bullpen.

The Padres placed Morgan on the 15-day injured list Friday, retroactive to Sept. 9, due to right shoulder inflammation.

Morgan has been a reliable arm for the Padres out of the bullpen this season, posting a 2.80 ERA across 45 innings. The 25-year-old rookie will head to the injured list Friday, and he'll be eligible to return Sept. 24, two days before the Padres' final regular-season game. Per AJ Cassavell of MLB.com, Morgan intends to return once eligible, and his placement on the IL was precautionary. JP Sears was recalled from Triple-A El Paso in a corresponding move.

The Mariners recalled Legumina from Triple-A Tacoma on Friday.

Legumina has fired 5.2 shutout innings while striking out eight batters since being sent down to Triple-A in mid-August. He'll now return to Seattle to take on a middle-relief role and replace Jose Castillo, who was designated for assignment in a corresponding move.

Megill (elbow) didn't recover as well as anticipated after his most recent bullpen session but will throw another bullpen Saturday before facing possibly batters next week, Todd Rosiak of the Milwaukee Journal Sentinel reports.

Megill has been working his way back from a right flexor strain, and while he didn't recover as well as he hoped, his timeline for return doesn't seem to have changed much. His initial plan was to return Tuesday, but a return later next week seems more likely given his tentatively scheduled live BP session.

The Pirates optioned Holderman to Triple-A Indianapolis on Friday.

Holderman will end up as the odd man out of Pittsburgh's bullpen following Justin Lawrence's (elbow) return from the injured list. Holderman has taken a massive step back this year, posting a 7.01 ERA through 25.2 innings in the big leagues after logging a 3.16 ERA in 2024. Despite his performance, he remains a candidate to return to Pittsburgh if/when the Bucs need bullpen depth for their final stretch of games.

The Pirates reinstated Lawrence (elbow) from the 60-day injured list Friday.

Elbow inflammation has kept Lawrence on the injured list since late April, but after more than four months on the shelf, the 30-year-old has been cleared to help out the Pirates for the final stage of the regular season. Lawrence was off to a strong start before getting hurt, posting a 0.79 ERA in 11.1 frames, but he struggled during his rehab assignment while surrendering seven earned runs in 7.1 innings. He'll likely be limited to middle relief upon rejoining Pittsburgh's bullpen. Meanwhile, the Pirates will send Colin Holderman to Triple-A Indianapolis to clear a roster spot.

Hader (shoulder) has yet to resume throwing, Brian McTaggart of MLB.com reports.

Hader has yet to resume throwing since being shut down Aug. 15 due to a left shoulder capsule injury. The 31-year-old previously indicated that he'd need roughly three weeks to ramp up once cleared to throw. It's unclear when he'll start throwing at this point, but his postseason availability will be threatened if he doesn't begin soon.

The Tigers placed Gipson-Long on the 15-day injured list Friday against Miami due to neck stiffness.

Gipson-Long gave up seven runs in 2.1 innings in a start Thursday, and he'll now head to the injured list. Gipson-Long will be eligible for reinstatement Sept. 27, one day before the Tigers' final regular-season contest. Detroit activated Jose Urquidy (elbow) from the injured list in a corresponding move, but it's unclear who'll take Gipson-Long's spot in the rotation.

The Tigers recalled Brieske (forearm) from Triple-A Toledo on Friday and placed him on the 60-day injured list.

Brieske has already been ruled out for the remainder of the 2025 campaign due to a right forearm strain, so the Tigers will perform a bit of roster manipulation that will allow the team to give the 27-year-old's 40-man spot to the newly activated Jose Urquidy (elbow). Sawyer Gipson-Long (neck) was also placed on the 15-day IL as part of Friday's roster moves.