5:27pm: It seems as if Zimmermann is expected to be able to rehab the injury without surgery, MLB.com’s Jason Beck reports on Twitter. Team trainer Doug Teter says that the veteran will wait for five to seven days before he begins working back. It’s at least possible Zimmermann could return to the active roster within three or four weeks.

3:05pm: The Tigers announced today that righty Jordan Zimmermann has been placed on the 10-day injured list with a sprained ulnar collateral ligament in his pitching elbow. He’ll be replaced on the active roster by fellow right-hander Zac Reininger.

That’s certainly ominous news for the veteran hurler, who left his start yesterday with elbow troubles. Zimmermann is already pitching on a replacement UCL after previously undergoing Tommy John surgery. It’s not known at this point whether a surgical outcome is on the table.