Cubs starter Andrew Cashner will be out until at least the All-Star break after an MRI showed he aggravated the tightness in his right shoulder, the team announced.
Cashner, 24, was the team's first-round pick in the 2008 draft and pitched out of the bullpen as a rookie last season before moving to the starting rotation this season, where he made one start, going 5 1/3 innings on April 5, but leaving after his shoulder bothered him.
Cashner was supposed to start in an extended spring training game on Monday, but was scratched and now the Cubs say they're "back to square one" with his rehab (via the Chicago Tribune.)
"I feel real bad for him," general manager Jim Hendry told reporters. "He worked real hard and his rehab had gone really well up to this point. Obviously the main goal will be to continue to get it right so he can continue to have a bright future. It's unfortunate."