"Marc wasn't feeling well when he came to the rink (Friday)," Penguins coach Mike Sullivan said before the game. "We sent him to see our doctors (and) he was diagnosed with a concussion (Friday) afternoon. He's not with us right now."
Fleury, who is 35-17-6 in 58 games this season, missed two weeks in December with a concussion.
Matt Murray starts for the Penguins against the Islanders, and Jeff Zatkoff will back him up.
The Penguins will clinch a playoff berth if they defeat the Islanders in any fashion Saturday or if the Detroit Red Wings lose to the Toronto Maple Leafs in any fashion or if Pittsburgh gets one point against the Islanders and the Red Wings defeat the Maple Leafs in a shootout.
