Indians starter Justin Masterson had to leave Monday's start at home against Baltimore after just two batters into the second inning due to soreness above his left rib cage, MLB.com reports. His removal from the game was precautionary.

Masterson gave up one run on one hit and one walk over one full inning of work before leaving in favor of Preston Guilmet. Masterson was on the hook for the loss at the time, though it was very early in the game that he was injured. He threw just 25 pitches for the Indians and his ERA is at 3.52.

Masterson was 14-9 on the season as he entered the start Monday. He's been the ace of the Cleveland staff and hopefully isn't badly injured. He's scheduled to make his next appearance Sunday against the Mets, if he's healthy enough to make it.