This is the first time Hader has been on the IL for an injury in his nine major-league seasons. The Astros signed Hader to a five-year, $95 million contract prior to last season. He had a 2.05 ERA and was 28-for-29 in save chances this year, also garnering his sixth All-Star selection, before landing on the IL.

Houston Astros closer Josh Hader will seek a second opinion on his injured left shoulder, manager Joe Espada said Wednesday. Hader was placed on the 15-day injured list Tuesday with what the Astros termed a left shoulder strain. Espada did not offer further details about Hader's injury or the first medical opinion Wednesday.

Hader, 31, has pitched just three times in August, with his most recent appearance (on Aug. 8) doubling as his seventh this season in which he's logged four or more outs. He's been highly effective overall, tallying a 2.05 ERA (202 ERA+) and a 4.75 strikeout-to-walk ratio.