How has American football ball changed over the years?

Answer 1

They started out knee-length and fairly tight, then gradually became shorter until by the late seventies players were wearing a sort of hot pants. Then gradually they started to become longer and looser again to today's knee-length, wide fit.

Answer 2

it went from a sport of pure brutality and violence, to one that is more tactical and involves a lot of strategy.

Answer 3

The new football helmets have a facemask, as the other ones didn't. The new ones are now made of plastic, not leather padding as they used to be.

Answer 4

there are more colors