Dean Pees.

The Washington Post's Mark Maske says that the Pats won't miss Eric Mangini:

Mangini is regarded as a Belichick clone and a rising star in the coaching ranks. But he was a rookie defensive coordinator last season and provided only an ordinary performance; some people around the league said his game plans, especially early in the season, seemed designed mostly to protect the secondary that he'd overseen previously. He wasn't ready to be a head coach and got the job mostly because he's close to the Jets' new general manager, Mike Tannenbaum. Mangini probably would have developed, in time, into a superb defensive coordinator and ready-for-prime-time head-coaching candidate. But it's likely that Pees will do at least as good a job this coming season as Mangini did last season.