"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," reports the AP. His Friday MRI revealed rotator cuff tendinitis, which appears to be the same problem Prior had at the beginning of the season. "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."

Prior going to the DL made room for Angel Guzman on the 25-man roster. Guzman started tonight's game in Colorado and again struggled as a major league starter, failing to last three innings. As I've mentioned before, Guzman "needs to have good command because, as good as his stuff is, hitters do have some success against him when they connect." He gave up 9 hits tonight.