"Nothing severe," Asche said. "I've been playing through it for about six or seven games. I don't think the training staff really liked the way it was headed, so we're just trying to kill it right now. We've got a pretty important stretch right now."
Asche missed some time in early April because of a hamstring issue.
"It's a little bit different," he said.
Todd Zolecki is a reporter for MLB.com. Erik Bacharach is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.