What is the main conflict in Gym Candy by Carl Deuker?

Mick Johnson is the son of Mike Johnson, a former college star and NFL player whose career was ended by an injury. Mick wants to be just like his father, and wants to be an even better football player. But Mick soon discovers that his father's career was not ended by an injury, but by his father's arrogance when he was arrested for drunk driving, skipped team meetings, fought with his teammates, and became a liability. Steroids become another conflict in the story as Mick begins using them.