Center Sidney Crosby remains unsure if he will rejoin the Penguins' lineup Sunday against the Boston Bruins at Consol Energy Center. Crosby participated with the Penguins during Friday's morning skate, one day after taking part in a private workout with teammates Dustin Jeffrey and Eric Tangradi. On the possibility of playing against Boston, Crosby said: "Not anymore than it was before. It's just one of those things where you're trying to go through and make sure you test yourself. I'm going to try and do my best to do that. I did it today. We'll see and kind of go from there." Crosby suggested that he might not be able to play simply because he hasn't yet endured enough practice time with contact. "It's been good, a little bit of contact," Crosby said. "But just the way the schedule has worked out, I haven't really tested things as best as I'd like. The good thing is that even after the minimal bumping I've kind of done, it's (his health) been good." Crosby last played Dec. 5.