"He had some discomfort, so we let him come in the next day and get evaluated and we felt we needed to have him see our doctors; we sent him here," said Luhnow, who remained in Houston during the series against the Tigers.
Cisnero was called up from Triple-A Oklahoma City on April 25 and has since appeared in five games with the Astros. Cisnero's injury could play into the roster decisions the Astros are going to have to make soon. Starting pitcher Scott Feldman is set to come off the disabled list on Friday, and reliever Matt Albers will throw a simulated game on Friday and could come off the DL this weekend.
"There will probably be a couple of things we have to do, depending on how long Cisnero is going to be out," Luhnow said.
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.