My boys aren't (yet) big football fans -- although being in Packer Country, they all avidly followed the Brett Favre retirement/un-retirement saga with interest. But they all know who's playing in the Big Game today (go Arizona!), and I'm sure they'll sneak a peek while their Dad watches the game.
And who knows? Just like their uncles, my brothers, they might learn to multiply by watching football. My brother, Doc, had his 7 times tables down by 2nd grade, thanks to football!
For an example of some more football math, check here and here.