Chad Pennington is underrated, so is J.P. Losman. You don't have to like the Jets, but the fact is with Pennington they went 10-6, without him they went 4-12. I think he and the o-line are more responsible for that change than Mangini's magic. He averages 7.2 yards per attempt, how that's possible when he only throws 5 yards is another story, but fact is he still completes passes. http://www.pro-football-reference.com/players/PennCh01.htm
I think J.P. will end up being the better QB and I don't think Pennington will ever get to a probowl. That aside he's still a top-20 consistant QB in this league. He's an upgraded Kelly Holcomb