The Rockies recalled Rolison from Triple-A Albuquerque on Monday.

Rolison will provide the Rockies with another relief arm in September. The lefty has a 7.41 ERA, 1.81 WHIP and 21:18 K:BB over 37.2 innings with Colorado this season.

The Giants selected Brubaker's contract from Triple-A Sacramento on Monday.

Brubaker inked a minor-league deal with San Francisco last month following his release from the Yankees. The 31-year-old right-hander pitched in 12 games out of the bullpen for New York this season, logging a 3.38 ERA, 1.19 WHIP and 10:9 K:BB across 16 innings. He'll likely work in relief for the Giants initially, but he could get a look in the rotation at some point in September with injuries having tested the team's starting depth of late.

O'Brien will be shut down from throwing after undergoing an MRI on his sore right shoulder Monday, John Denton of MLB.com reports.

The Cardinals have yet to provide word on the results of the MRI, but a move to the 15-day injured list for O'Brien feels inevitable. O'Brien has been used as a high-leverage reliever for the Cardinals over the last couple months and picked up a pair of saves in August, but now his health status is murky. JoJo Romero is the favorite to close games for the Cardinals in September, with Kyle Leahy also in the mix.

The Brewers recalled Yoho from Triple-A Nashville on Monday.

Yoho came into the season as one of baseball's top reliever prospects, but his control has deserted him in the majors. He has an 8.22 ERA and 9:5 BB:K in 7.2 innings across three separate stints with the Brewers in 2025. Yoho has been as advertised at Triple-A, however, logging a 1.04 ERA, 1.02 WHIP, 55 strikeouts and seven saves in 43.1 innings across 39 appearances. Yoho should work in low-leverage situations as he rejoins Milwaukee, at least initially.

The Phillies activated Mayza (lat) from the 60-day injured list Monday.

The Phillies claimed Mayza off waivers from the Pirates on Sunday while he was nearing the end of his rehab assignment, and he'll be activated Monday as Philadelphia's active roster expands to 28 men. Mayza had a 1.93 ERA, 1.07 WHIP and six strikeouts in 4.2 innings on his rehab assignment and he should operate in low-leverage situations down the stretch.

Waddell gave up three hits and two walks over 4.1 scoreless relief innings in Sunday's loss to the Marlins. He struck out four.

Called back up to the majors earlier in the day, Waddell took over from a struggling Kodai Senga in the fifth inning and gave the rest of the Mets' bullpen the day off, tossing 58 pitches (41 strikes) to go the rest of the way in a 5-1 loss. That workload might result in him getting bumped back to Triple-A Syracuse in favor of a fresh arm, but with the team's rotation in general struggling in August, Waddell could end up being a key figure in any September playoff push. The southpaw's worked at least three innings in five of his last six big-league appearances dating back to June 28, posting a 3.66 ERA, 1.37 WHIP and 15:8 K:BB in 19.2 innings during those outings.

The Cardinals recalled Roycroft from Triple-A Memphis on Monday, John Denton of MLB.com reports.

Roycroft has been shuttled back and forth between Memphis and St. Louis numerous times this season, though he'll be returning to the big leagues for the first time since June. The big righty holds a 6.92 ERA and 9:9 K:BB over 13 innings for St. Louis in 2025.

The Marlins transferred Zuber (lat) from the 15-day injured list to the 60-day IL on Monday.

Miami placed Zuber on the 15-day IL on Saturday after he was diagnosed with a right lat strain, and his move to the 60-day IL two days later confirms that he won't pitch again in 2025. The Marlins called up right-hander Luarbert Arias from Triple-A Jacksonville to replace Zuber on the 40-man roster.

The Marlins recalled Petersen from Triple-A Jacksonville on Monday.

Petersen was acquired from Atlanta in exchange for cash back in July. The 31-year-old right-hander has appeared in 12 games (one start) for Jacksonville since the trade, registering a 6.00 ERA, 1.33 WHIP and 19:5 K:BB across 12 innings. He'll likely be ticketed for low-leverage work out of the Miami bullpen.

The Marlins transferred Bender (tibia) from the 15-day injured list to the 60-day IL on Monday.

Bender had already been ruled out for the season after being diagnosed Aug. 19 with a right tibial stress reaction, so his move to the 60-day IL merely opens up a spot on the 40-man roster for one of the Marlins' three September call-ups. Before getting shut down with the injury, Bender appeared in 51 games out of the Miami bullpen and logged a 2.16 ERA, 1.06 WHIP and 42:21 K:BB while collecting three wins, four saves and 19 holds in 50 innings.