Eyeshield 21

A brief description of the manga Eyeshield 21:

Wimpy Sena Kobayakawa has spent his entire life running away from bullies. When Sena puts on his football gear, everything change—his quickness and amazing ability to evade enormous bullies may just give him what it takes to become a great high school football star! Enjoy all of the touching coming-of-age story’s bone-crushing action and slapstick hilarity.