The 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 Avalanche on Tuesday night and, as a direct result of the depleted defense (and lackluster goaltending), the Devils allowed four power play goals.