Cabrera has displayed diminished velocity on his fastball in recent starts, and was reluctant to address a possible injury after a poor performance against the New York Yankees on Sunday. An exam by Dr. John Wilckens on Monday was inconclusive.
"Dr. Wilckens doesn't seem to think there's a problem, but Daniel will have an MRI as a precautionary measure," Orioles manager Dave Trembley said Monday night after Baltimore beat Chicago 4-3 in the completion of a game suspended on April 28.
After allowing seven runs in 3 2/3 innings Sunday, Cabrera was asked if he was healthy.
"I don't have an answer for that question right now," he said. He also refused to explain why the velocity on his fastball had dropped into the low 90s.
Trembley expects Cabrera to start Saturday against Tampa Bay, pending the results of the MRI.
"I guess after he has the MRI, I'll have more to say," Trembley said.
Cabrera is 8-8 with a 5.24 ERA. He has allowed at least six earned runs in five of eight starts since the All-Star break.
"I'm not trying to diminish if there's something wrong with his arm," Trembley said, "but I think the guy is disappointed. He's upset with himself."