Starting pitcher Matt Garza was put on the 15-day disabled list by the Milwaukee Brewers because of a strained muscle in his back. The move is retroactive to Saturday.
Right-hander Tyler Cravy was recalled from triple-A Colorado Springs on Tuesday to replace Garza.
Garza departed an exhibition game start Friday in the fourth inning with what was then described as right shoulder tightness.
The veteran right-hander was looking to rebound from his worst season since his rookie year with Minnesota in 2006. He was 6-14 with a 5.63 earned-run average in 25 starts last season.
Garza was 1-0 with a 4.50 ERA in six starts in spring training.