Mike Pettine, the current Ravens' Linebackers Coach, is expected to join the New York Jets, as the defensive coordinator, replacing Bob Sutton. This is good news for the Jets, because he and Ryan knows how to coach a defense, and teaches his D how to play physical, a far cry from how the Jets defense performed in their last five games of the season.
They started the season 8-3, and the run defense was like a stone wall, and they were well in their way into the playoffs.
Unfortunately, the season was sixteen games long, not eleven. The Jets couldn't stop: Peyton Hillis, Frank Gore, Marshawn Lynch, Maurice Morris, Ricky Williams, and Ronnie Brown in that span. They lost four of their last five games (the Bills game at home was their only win in that span, (and they needed Dick Jauron to make a dumb decision, calling a pass play, which ended up being a fumble return for a TD by Shaun Ellis)) to finish 9-7, and miss the playoffs.
Their pass defense was also weak, despite having athletic players like Kerry Rhodes, Abram Elam, Darrelle Revis, and Dwight Lowery. The Jets finished 29th in the NFL in yards allowed per game, 31st in the NFL in 1st downs allowed in the air, there's no excuse for that.
The pass rush, which was once deadly, slowed down, and got pressure once in a blue moon in their last five games, the result was Jay Cutler, Shaun Hill, Seneca Wallace, and Chad Pennington looked like Joe Montana, and the statistically weak pass defense was exploited.
Expect some improvements in the D next season with Ryan, and Mike Pettine (if he comes). J-e-t-s Jets! Jets! Jets!