Originally Posted by
Arctic Blast
I would actually tend to agree with 1960. Not only the AFL came in, but also the Dallas Cowboys and, the following year, the Minnesota Vikings. Also, most teams by then were at least playing a somewhat modern version of football, with the forward pass not looked at like some sort of voodoo. :D
Like someone else posted, though, I don't think there's any sort of database like you have with Lahman for baseball, and entering every single player for that length of time would be a MASSIVE time investment.