"I don't want to rush it and take 100 swings," Kipnis said. "It's like a hamstring. If you push it too fast, you're going to [have a setback]."
Kipnis was batting .234 with three homers and 12 RBIs in 26 games before the injury.
Anthony Castrovince is a reporter for MLB.com. Read his columns and his blog, CastroTurf, and follow him on Twitter at @Castrovince. This story was not subject to the approval of Major League Baseball or its clubs.