The Chicago Cubs placed Mark Prior on the 15-day disabled list Saturday with shoulder tendinitis, a move that could mean an end to the right-hander's season.
Prior has been on the DL eight times in his four-year career in the majors, including three this season. The latest trip comes after he allowed five earned runs in three innings in an 8-6 loss to Milwaukee on Thursday.
Prior didn't feel anything wrong with the shoulder, but a loss in velocity in the third inning led the team to send him back to Chicago for an MRI on Friday, which showed rotator cuff tendinitis.
The Cubs want Prior to rest for three weeks before throwing again, which could mean the end of his season if he doesn't have time to make enough rehab starts before rejoining the Cubs.