"We're going to re-evaluate him after today and make a decision for the rest of the rehab," Porter said. "He didn't have a setback, but he had some discomfort. The trainer just made a decision of, 'You know what? We're going to go ahead and scratch him and give him a couple of more days of treatment and see how it goes.'"
Presley has been on the disabled list since he strained his right oblique swinging the bat July 7 in Arlington. The Astros were hoping to get him back at some point during this weekend's series against the Red Sox, but that's up in the air.
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.