In the hour before their series opener Monday against the Tigers, the Yankees were handed some of their most serious injury news to date.

Miguel Andujar, last year's runner-up in the American League Rookie of the Year voting, was diagnosed with a small labrum tear in his right shoulder.

Because tests are still pending and a treatment plan is still being developed, it's unclear for now just how long Andujar might be out. Early physical testing of Andujar's throwing shoulder has been promising. Still, he was placed on the 10-day injured list for now.

"Surgery could be in play, which would obviously compromise his season," Yankees manager Aaron Boone said after Monday's 3-1 Yankees win. "There is some optimism that if treated conservatively, he can respond and come back and play good.

"But we'll know that in a couple of weeks."