If you have an interest in old-school football, check out "Instant Replay" by Jerry Kramer. Kramer was a guard on the 1960s-era Green Bay Packers, and the book is a daily diary of the 1966 season. Very interesting to read about football back in the day, to wit:
Talking about the league eliminating "pep pills" from the locker rooms a few years before;
A new sideline beverage from Florida called "Gatorade" a mixture of water, salt, glucose and "it tastes good"
Getting an opportunity to see the "brand new" landmark Arch in St Louis
Talking about his blacking out during the second half of a game after a concussion and not missing a subsequent practice
A great insight into football back in the day, and the historical references above are amusing. Eye-opening is his reference to black players as "negroes" or "colored", and how black players had to use separate entrances to restaurants down south - Lombardi had the whole team use the back entrance. Also eye-opening are the descriptions of injuries and how archaic the treatment and recognition of them were. Check it out!
Any suggestions for other good football books worth checking out?