3:38pm: Brian Cashman confirmed Joba suffered the injury warming up on Tuesday. He called it a “mild” strain, for what it’s worth. A decision has not been made about who will be called up, but it definitely will not be Clay Rapada or Chien-Ming Wang according to the GM. Rapada can be called back up to the big leagues starting tomorrow.

2:44pm: The Yankees have placed right-hander Joba Chamberlain on the 15-day DL with a right oblique strain, the team announced. The DL stint is retroactive to April 28th, so he is eligible to return in a week and four days. Obliques are tricky though, he could easily be out longer. David Robertson missed a month with an oblique issue last year, for example.

Joba, 27, warmed up on Tuesday but did not appear in the game, as our Bullpen Workload page shows. I guess that’s when it happened. He pitched in three straight games last weekend and there was no indication he was hurt. No word on who will take his place on the roster just yet, but Cody Eppley seems like a safe bet. Joba has pitched pretty well this year (3.86 ERA and 3.45 FIP), especially of late. Shawn Kelley seems likely to assume seventh inning duties along with Boone Logan.