This is because the first ever football was made out of pigskin.
i THINK it is pigskin
Back then it was made of pigskin and people called "tossing around the ol' pigskin." But today it is made of leather.
Football are sometimes called a "pigskin," which makes people think footballs might be made out of pigs. But nope! The NFL's official footballs are made of premium cowhide leather.
The first football was made out of pigskin
Yes, the first ever football was made out of pigskin.
I think the football is made out of pigskin.
the ball used to be made of pigskin, and then inflated.
The term pigskin refers to football since the first footballs were made from pig skin. For example, tossing the pigskin.
Not todays footballs, however in the early ages of football, the ball was made of pigskin