by Jay Glazer

The Jets have asked for permission to interview Giants defensive coordinator Steve Spagnuolo to replace Eric Mangini, team sources told FOXSports.com.

Spagnuolo is considered one of this year's crown jewels among head-coaching candidates. It is also believed that the Jets could have interest in former Steelers head coach Bill Cowher.

By going after Spagnuolo, the Jets would make a huge dent in the New York football landscape. Spagnuolo is loved by his Giants players. In fact, former Giants defensive end and current FOX NFL Sunday analyst Michael Strahan went as far as saying he'd almost return to football — not for the money, but because he wanted more years playing under Spagnuolo.