Add Joba Chamberlain to the Yankees’ ever-growing list of injury woes.

The righty reliever suffered an oblique strain and was placed on the 15-day DL on Thursday, retroactive to Apr. 28, the day after his most recent appearance.

This news comes a day after setup man David Robertson tweaked his hamstring, while trying to cover first base.

“I just kind of felt some discomfort,” Robertson said after the Yankees’ 5-4 win over the Astros. “I felt at first it was my left knee, but I think it was just my hamstring. It’s just a little tight. I may have tweaked it a little bit.”