The Cleveland Guardians will shut down Triston McKenzie for at least two weeks.
An MRI revealed a strain in his right teres major muscle.
McKenzie won't throw for two weeks, and may require up to eight weeks to return to play. He was scheduled to be the No. 2 starter for the Guardians.
The 25-year-old posted a 2.96 ERA and 190 strikeouts over 191 1/3 innings in 2022.