Astros manager Bo Porter noticed his leadoff man grimace on the swing and sent assistant athletic trainer Rex Jones to the plate to check on the rookie. Matt Pagnozzi, acquired by the Astros in a trade late Monday, took Grossman's place in the box and grounded out to end the game.
Grossman said he had a similar injury a few years ago.
"At this stage of the season, you just don't want to end up having a guy miss a considerable amount of time," Porter said. "It was best to get him out at that point and allow the trainers to do everything they can to get him healthy."
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.