Athletics reliever Sean Doolittle is back on the disabled list with a strained left shoulder, Susan Slusser of the San Francisco Chronicle reports. Angel Castro has been called up from Triple-A Nashville.
Doolittle had missed the first two months of the season due to a partial tear of his rotator cuff before making his season debut against the Tigers on May 27. The lefty, however, only topped out at 89 MPH against the Tigers and reportedly looked uncomfortable playing catch on Friday.
Tyler Clippard will continue serving as the team’s closer while Doolittle is out. He’s 6-for-7 converting saves thus far with a 2.53 ERA and a 17/12 K/BB ratio in 21 1/3 innings.