The Pittsburgh Penguins' injury woes continue.

Rookie defenseman John Marino will undergo surgery Monday after taking a slap shot to his face on Thursday, and there is no timetable for his return to action, head coach Mike Sullivan told reporters, per NHL.com's Wes Crosby.

Marino was able to skate off the ice with the help of a trainer following the shot from Tampa Bay Lightning star Steven Stamkos, but he did not return to the game.

While it was initially believed that Marino had avoided a serious injury, he was later diagnosed with three broken bones in his cheek that would require surgery, the Pittsburgh Post Gazette's Matt Vensel reported Friday.

The 22-year-old Marino has been a revelation for the Penguins on the blue line this season. He's racked up five goals and 25 points in 51 games while averaging 20:19 minutes of ice time.

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