"We'll have a better indication of where he is after batting practice," Melvin said.
Meanwhile, infielder Adam Rosales is getting closer to a rehab assignment.
Rosales took batting practice the past two days and needs to clear one final hurdle as he recovers from a strained left intercostal.
"He needs to turn the double play and make an aggressive throw," Melvin said. "That's how he hurt it in the first place."
Rick Eymer is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.