In over 38 years of watching football, I have come to understand a great many things about the game. One of them is that rivalries live on from generation to generation.As a youngster growing up, it was instilled in me that Dallas and Tom Landry were the enemy. My father was an Eagles fan and games played in Philadelphia between the Eagles and Giants were blood baths as well. While dad was not shy about his disdain for either team, the Eagles - good, bad, or ugly - were still the team he watched and rooted for.Personally, I thought since we lived in Florida, the aqua and orange of the Dolphins looked pretty cool together.Rivalries in the NFL then and now add to the importance of tradition in this league. Whether it is a game of old AFL rivals like Oakland and Kansas City or current NFC West opponents, San Francisco and Seattle, there is plenty of excitement to talk about and debate.Although they are not ranked in any particular order, here are the 10 most heated rivalries in the NFL...

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