NBC continues to play musical chairs on Football Night in America, the network's Sunday night blanket coverage of the NFL including a prime time game. (I'm surprised NBC hasn't added Jay Leno to the broadcast!) The latest change is an interesting one: Super Bowl winning coach Tony Dungy is joining the panel and former running back Jerome Bettis is out. What's interesting is that they are two completely different types.

Bettis, whose nickname is "The Bus," is well-known as the smiling winner from the 2006 Pittsburgh Steelers' Super Bowl team. He's loud, boisterous and a larger-than-life personality. Dungy, on the other hand, was the architect and head man for the 2007 Indianapolis Colts' Super Bowl championship. He is cerebral and thoughtful and the author of a bestselling memoir, Quiet Strength: The Principles, Practices, and Priorities of a Winning Life. You could say that the two men are the anti-thesis of each other, which is likely why NBC has made the switch.