Eric Thames left Wednesday's game against the Cincinnati Reds in the top of the eighth inning with tightness in his left hamstring.
Craig Counsell said after the Milwaukee Brewers' victory that the injury is "not a big deal."
"It just kind of tightened up over the day," Counsell said. "It is really the on-base stuff. He's just been on-base a whole bunch, running the bases, scoring from first, so just a whole bunch of baserunning."
Thames leads all of baseball with 11 home runs.