FILE – In this Feb. 14, 2020, file photo, Cleveland Indians pitcher Emmanuel Clase stretches during spring training baseball workouts for pitchers and catchers in Avondale, Ariz. The hard-throwing Clase, who was acquired this winter from Texas in the trade for two-time Cy Young winner Corey Kluber, experienced upper arm discomfort following a bullpen session last week. He continued to have issues this week and the Indians had him undergo tests Wednesday, Feb. 26, 2020. An MRI confirmed a moderate strain of the teres major muscle in his upper back. The team said he will be re-evaluated weekly, but the x-year-old is expected to miss 8-to-12 weeks of game activity.(AP Photo/Ross D. Franklin, File)
Cleveland Indians relief pitcher Emmanuel Clase experienced an onset of upper arm discomfort following a bullpen last week, felt additional discomfort Tuesday and subsequently underwent imaging and examination on Wednesday.
The MRI and exam confirmed a moderate strain of the teres major muscle in his upper back.
He will be re-evaluated weekly, but is expected to miss 8-to-12 weeks of game activity.
The hard throwing right hander was acquired by the Indians in the off-season in the trade that sent Corey Kluber to the Texas Rangers.