New Jersey Devils must lean on discipline to survive injury crisis

New Jersey Devils v Colorado Avalanche | Tyler Schank/Clarkson Creative/GettyImagesThe New Jersey Devils are going to be without defenseman Brett Pesce and center Cody Glass for an extended period of time, which, by extension, removes two of the team's best penalty killers from a unit that is currently top-10 in the NHL.

Prospect Seamus Casey, who only recently returned from an injury of his own, is an exciting player, but he's hardly a plug-and-play replacement for Pesce.

With Casey, Simon Nemec, Luke Hughes, and Dougie Hamilton in the lineup, two-thirds of the Devils' defense is comprised of offensively-oriented players.

Casey drew in for Pesce for the Devils' game against the Colorado…