"He's a little sore today, but we'll probably make a decision [on Thursday] about what we want to do there," manager Buck Showalter said. "It will be kind of tough going into six National League games with a short bench. It's kind of tough to test it out, because you don't want to injure it further."
Chavez injured the hamstring while advancing to second on an errant throw by Pirates reliever Chris Resop after hitting a single in the sixth inning. Chavez was on the disabled list earlier this season with an injured left oblique and is hitting .171 with four RBIs in 32 games.
"It's tough when you're trying to help the team and play every day," Chavez said. "Now this happens. It's a little frustrating."