I really dont think it matters what age you start playing football. If a kid loves football he will play football for as long as he loves it. When that love for the game starts to wear off, then thats when you start questioning yourself wether or not you wanna play anymore, it all depends on just how much you like the game.I've been playing since I was in 6th grade, which is a good age to start, but I'm now entering my junior year in high school, and Im not to burnt out on it. I still like the game alot and wouldnt trade anything for friday nights in the fall.