The 10 Biggest Coaching Feuds in NFL History

Whether coach-to-coach, coach-to-player or coaches feuding with owners, it's always been fun to watch these kinds of events unfold.

In this series, I will be presenting the 10 best feuds involving NFL coaches, though in the case of coach-player feuds, you may notice that some players seem to have issues with anyone who coaches them.

Look, football is no different than any other profession; there are guys who just don't like other guys, those that don't see eye-to-eye and circumstances that get heated.

Yet unlike the business world, there is enough media around to make sure we sit up and take notice.

So, without further ado, let's take a look at some of the best of the NFL coaching feuds. Here we go...

10. Mike Shanahan and Al Davis

9. Steve Mariucci & T.O.; Andy Reid & TO

8. Joe Montana and Bill Walsh

7. Troy Aikman and Barry Switzer

6. Bill Belichick and Eric Mangini

Yes, "Spygate."

Mangini ratted on his ex-mentor and just happened to be coaching the Jets when the Patriots head coach's team was caught videotaping the Jets defensive signals from an unauthorized location in their Week 1 game in 2007.

Mangini was the Belichick disciple who left the Patriots to take over the Jets. Belichick turned a cold shoulder to Mangini, barely shaking his hand or making eye contact with him during postgame handshakes.

Something to hide Bill?

5. Terry Bradshaw and Chuck Noll

4. Bill Belichick and Tony Dungy

3. Mike Ditka and Forrest Gregg

2. George Allen and Tom Landry

1. Mike Ditka and Buddy Ryan