The Angels recalled Silseth from Triple-A Salt Lake on Thursday.

The moves comes as the Angels place Reid Detmers (elbow) on the 15-day injured list. Silseth appeared in one game for Triple-A Salt Lake after his demotion Sunday, in which he allowed no runs on two hits in one inning.

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

The Rockies sent Rolison down to the minors Sept. 3, but he'll now return to the big leagues to replace Luis Peralta, who landed on the injured list Thursday with a hip injury. The 28-year-old Rolison carries a 7.15 ERA and 1.82 WHIP through 39 frames in the bigs this season and isn't likely to pitch in high-leverage situations anytime soon.

The Rockies placed Peralta on the 15-day injured list Thursday, retroactive to Monday, with left hip inflammation.

Peralta has struggled mightily in the majors this season, posting a 10.80 ERA and 2.40 WHIP across 16.2 innings alongside a 14:16 K:BB. The 24-year-old will be eligible to return before the end of the season, but the Rockies likely won't be in a rush to bring him back based on his performance and the fact that they are firmly out of contention for a postseason spot. Ryan Rolison was recalled from Triple-A in a corresponding move.

Akin earned the save in Thursday's 3-2 win over the Pirates, allowing one hit while striking out one in a scoreless ninth inning.

Akin is up to five saves this season, with two coming since the start of September. The left-hander has pitched well of late, working to a 1.88 ERA in his last 12 appearances (14.1 innings). Akin and Yennier Cano should continue to share closing duties down the stretch. Through 57.1 innings this season, Akin sports a 3.14 ERA with a 1.34 WHIP and 54 strikeouts.

The Tigers optioned Sommers to Triple-A Toledo on Thursday, Chris McCosky of The Detroit News reports.

The 25-year-old lefty joined the big-league bullpen Tuesday when Bailey Horn went on the paternity list and will now head back to the minors following the latter's return. Sommers has given up six earned runs in just three MLB innings this year, but he's put himself in a position to audition for next year's Opening Day bullpen by turning in a 3.03 ERA and 1.08 WHIP through 35.2 frames in Triple-A.

The Tigers reinstated Horn from the paternity list Thursday, Chris McCosky of The Detroit News reports.

Horn will reclaim a middle-relief role in the Tigers' bullpen after spending two days away from the team for the birth of his child. Drew Sommers was sent back to Triple-A Toledo in a corresponding move.

The Mets recalled Brazoban from Triple-A Syracuse on Thursday.

Brazoban has put up a 3.91 ERA and 1.32 WHIP across 53 innings in the big leagues this season. He'll rejoin the Mets' bullpen to provide the team with an additional fresh arm, replacing Justin Hagenman, and is likely to work primarily in middle relief.

The Mets optioned Hagenman to Triple-A Syracuse on Thursday.

Hagenman did his best to save the Mets' bullpen by throwing 75 pitches during a three-inning relief appearance Tuesday in Philadelphia. Unfortunately for him, he'll now have to be replaced by a fresh relief arm.

The Marlins designated Martinez for assignment Thursday.

Martinez has made six appearances since joining the active roster Aug. 27, across which he coughed up four earned runs over 6.2 innings. He'll now lose his place on the MLB and 40-man rosters to make room for Ryan Weathers' (lat) return from the 60-day IL.

The Reds optioned Zulueta to Triple-A Louisville on Thursday.

With Graham Ashcraft (forearm) and Chase Burns (elbow) both returning from the injured list Thursday, the Reds will move Zulueta and Lyon Richardson to Triple-A in order to create roster space. Zulueta gave up two runs over two innings during his latest stint with Cincinnati, elevating his big-league ERA to 6.14 through 7.1 frames.