You Just Can't Keep a Good Pitcher Down.

According to Tony Massorotti David Aardsma has been placed on the DL with a strained right groin and has been replaced by Justin Masterson. Masterson had success against the Angels during his start in April-it'll be interesting to see how he's transitioned to relieving and if he can continue to be successful. Speedy recovery to Aardsma, though.