Josh Hader going on the injured list was part of a series of moves the Astros made Tuesday involving their bullpen.

Houston Astros All-Star closer Josh Hader was placed on the 15-day disabled list Tuesday with a strained left shoulder. The move, retroactive to Monday, comes after the left-hander reported shoulder discomfort before Monday's game against the Boston Red Sox.

Six-time All-Star Josh Hader, who is currently tied for third in MLB with 28 saves, will have to recover from a left shoulder strain before he returns to the mound for the Houston Astros.

Its Tuesday, August 12 and the Red Sox (65-55) are in Houston to take on the Astros (67-52). Dustin May is slated to take the mound for Boston against Spencer Arrighetti for Houston. Game 1 of this series saw the Astros jump out to a 7-2 lead and hold on late for a 7-6 win.