"I think he's OK," Roenicke said. "We're thinking more that he was dehydrated, and didn't probably drink as much water as he should have. … I'm hoping he'll be OK [on Saturday]. I don't know yet if I'm going to play him, but hopefully he'll be OK."
Davis, who hit his 11th home run of the year in the first, a two-run shot, reached for his left hamstring on the play and walked off the field with assistant athletic trainer Dave Yeager. Logan Schafer took over in left field.
The 25-year-old Davis, who went 2-for-4 and is hitting .279 this year, has also been fighting a sore left wrist in recent weeks.
Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.