High school buddies Joe "Coop" Cooper & Doug Remer ("South Park" creators Trey Parker & Matt Stone), invent a driveway game, a combination of baseball and basketball. As they move into adulthood, their increasingly popular game goes big-time with the help of eccentric billionaire Theodore Denslow (Borgnine), the founder of the National BASEketball League and owner of the Milwaukee Beers. After Denslow chokes to death on a hot dog, the team is left in Coop's hands. The future of the game is threatened when Denslow's widow (McCarthy) and industrialist Baster Caine (Vaughn) scheme to gain control for themselves.