He's Fang, the longhaired, jeans and tee-shirted mascot for the Arizona Rattlers, although no one actually calls him that to his face. Nah, he's the team's "enforcer," there to ensure that both sides of the stadium raise the "noise meter" up a respectable seven or eight notches.
Not that he even needs them, since he barrels through pyrotechnics on his thundering motorcycle. Once Fang gives his seal of approval, he's off again, which lets us know he really ain't such a trouble boy. Basically, Fang is what the Fonz would've turned out to be if he'd stopped hanging around those goody-goody Cunninghams and given those Steppenwolf albums a chance.