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Blake Treinen RP | LAD
Dodgers' Blake Treinen: Officially placed on IL
The Dodgers placed Treinen (shoulder) on the 15-day injured list Sunday.
Treinen injured his right shoulder while warming up in the bullpen during Saturday's game against the Giants. Per Fabian, the Dodgers suspect that Treinen suffered a capsule injury, and the right-hander will undergo an MRI on Monday to get more clarity on the matter. Bobby Miller was recalled from Triple-A Oklahoma City in a corresponding move.
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James McArthur RP | KC
Royals' James McArthur: Back from injured list
The Royals activated McArthur (elbow) from the 60-day injured list Sunday.
McArthur began the year on the shelf and ultimately required a third elbow procedure in May to combat continued soreness and inflammation in the region. If he ends up pitching in Sunday's season finale for Kansas City, it will be McArthur's first big-league appearance since 2024.
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Tony Gonsolin RP | KC
Royals' Tony Gonsolin: Lands on IL
The Royals placed Gonsolin on the 15-day injured list Sunday due to an allergic reaction.
James McArthur (elbow) was reinstated to take Gonsolin's spot on the active roster for the final day of the regular season. Gonsolin spent most of the year on the mend from Tommy John surgery with an internal brace, returning for a lone big-league appearance Sept. 22, when he allowed five runs on four hits and three walks while striking out five over 2.2 innings against the White Sox.
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Gavin Hollowell RP | CHC
Cubs' Gavin Hollowell: Sent down to minors
The Cubs optioned Hollowell to the Arizona Complex League on Sunday.
The move corresponds with Braxton Garrett being recalled from Triple-A Iowa. Hollowell was reinstated from the 15-day injured list Friday and recorded one out while issuing one walk against the Red Sox on the same day. He has a 2.45 ERA and 1.36 WHIP across 14.2 innings this season.
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Craig Yoho RP | CLE
Guardians' Craig Yoho: Sent down Sunday
The Guardians optioned Yoho to Triple-A Columbus on Sunday, Roundtable.io reports.
Yoho gave up two runs on three hits and a wild pitch while recording just one out Saturday, bringing his ERA up to 4.93 in 34 big-league appearances in 2026, and he will now head back to the minors to conclude the regular season. Austin Peterson replaces Yoho on the active roster and in the Cleveland bullpen.
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Austin Peterson RP | CLE
Guardians' Austin Peterson: Recalled to majors
The Guardians recalled Peterson from Triple-A Columbus on Sunday, Roundtable.io reports.
Craig Yoho was demoted after allowing two runs in just one-third of an inning Saturday, and it will be Peterson who takes Yoho's spot in the Cleveland bullpen. Peterson has made just one appearance for the Guardians to date, tossing two scoreless innings with three strikeouts against Detroit in his major-league debut back on Sept. 5. The right-hander turned in a 4.41 ERA, 1.41 WHIP and 107:38 K:BB over 102 innings with Columbus this season.
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Tayron Guerrero RP | BOS
Red Sox's Tyron Guerrero: Lands on injured list
The Red Sox placed Guerrero on the 15-day injured list Sunday, retroactive to Sept. 24, with a right shoulder strain.
Guerrero missed most of September with right shoulder inflammation before returning to the active roster Sept. 20. He's now dealing with more shoulder trouble, and it's uncertain if he might be able to return in October should the Red Sox advance deep in the playoffs. Guerrero has been a reliable arm for Boston this season, posting a 3.10 ERA and 1.11 WHIP with 18 holds across 40.2 innings (40 appearances).