Two-time AL Cy Young winner Corey Kluber could be done for the season.
He is headed to the injured list after just one inning of work in his debut as a Texas Rangers starter. He has a tear in a small muscle in his right shoulder and is not expected to make another start this season -- if he pitches at all.
He does not need surgery but will receive a platelet-rich plasma injection. The right-hander will then be evaluated in about four weeks to determine if he can start throwing again.
Team president and general manager Jon Daniels said Monday an MRI revealed a grade 2 tear.