Indians starting pitcher Justin Masterson, who left his start against Baltimore Monday due to soreness in his rib cage, said that hopefully he'll be able to return after a few days' rest, MLB.com reports.

Masterson will undergo an MRI on Tuesday morning to determine the extent of the injury. Manager Terry Francona would not speculate as to his recovery time at this point. He's scheduled to start Sunday against the Mets.

The ace of the Cleveland staff suffered the loss in the game Monday to fall to 14-10 on the year with a 3.52 ERA.