No doubt about it, the Rangers have had some serious roster turnover this season, especially among the bottom six forwards. Gone are Brandon Prust, John Mitchell, Ruslan Fedotenko, Artem Anisimov, and Brandon Dubinsky. In are Arron Asham, Taylor Pyatt, Jeff Halpern, and possibly Michael Haley (at least to start the season while Marian Gaborik is out). While the Rangers will surely miss most of the departed, where they will miss them the most is on the penalty kill.
Fedotenko, Prust, and Dubinsky were all top penalty killers for this club last season, with Anisimov and Mitchell seeing some time there as well. Of those coming in, only Halpern has experience as a top penalty killer. Asham and Pyatt have played there in the past, but not much (if at all) last season. This leaves a hole that needs to be filled, and needs to be filled from those already on the roster.