Crosby and Neil Walker, neither of whom is on the disabled list, remain sidelined after eerily similar collisions with Pittsburgh's right fielder. The absence of the pair forced the Bucs to play with just three hitters -- Ryan Church, Delwyn Young and Jason Jaramillo -- on the bench on Tuesday.
Crosby certainly looks poised to return before Walker. After colliding with Lastings Milledge in Monday's win over the Cubs and leaving the game an inning later, Crosby said he expected to participate in some pregame activities on Tuesday. Still, for precautionary reasons, he wasn't available for the game.
"I have a little bit of a headache, but other than that, I'm fine," Crosby said.
Manager John Russell said there is a chance that Crosby will be cleared to return to the field for Wednesday's series finale with the Cubs, though Thursday looks like a better option.
Walker, who suffered a concussion on Friday, visited a specialist in Pittsburgh on Tuesday. Russell said that he had received word that Walker was continuing to feel better, though the concussion symptoms haven't yet completely subsided. Those symptoms will have to disappear before Walker will be allowed to participate in baseball activities again.
If those symptoms are still bothering Walker at the end of the week, the Pirates will revisit the possibility of a DL stint. For now, the hope is that Walker can avoid that altogether.
"He felt much better today, so I'm hoping in the next day or two, he's going to feel good and we can get him back to activity," Russell said. "Each day, the symptoms are getting better."