"The Astros' bullpen has been among the best in baseball, and that is mostly tied to the success of Hader and right-hander Bryan Abreu."

Houston Astros All-Star closer Josh Hader will be shut down from throwing for approximately three weeks after the team announced Friday he has been diagnosed with left shoulder capsule strain.

That timeline would mean a late September return, so the expectation is that Hader won't be available until the postseason.