Drive to the Net: Is Friedman more than just depth?

Mark Friedman.COLUMBUS, Ohio -- As the NHL's trade deadline approaches, I'm more and more convinced that the Penguins' blue line depth will be sufficient for the remainder of the campaign.

Outside of the regulars, there's P.O. Joseph, who recorded three goals and nine points in his previous 10 games in Wilkes-Barre before getting the call to the big club as a result of Mike Matheson's injury that will keep him out week-to-week.

There's Juuso Riikola, who at the very least has shown competency at the NHL level, and at the very most has displayed the ability to crush a minimal role on the bottom pair.

And then there's Mark Friedman, a former third-round pick of the Flyers that has dressed for 30…