Robert De Niro is Gil Renard, baseball fan from hell. Bobby Rayburn (Wesley Snipes) is the player he is nuts about. No sooner does the talented Rayburn sign a huge contract with the San Francisco Giants, than everything in his life goes horribly wrong. Not only does his field play deteriorate along with his batting average, but someone murders his chief team rival. It's not revealing too much to say that Gil killed him, in the mistaken belief that he was doing Bobby a favor. When superfan Gil insinuates himself into Bobby's everyday life, the situation grows much worse, because this fixated nut-case has some very strange ideas about family solidarity. Amusing highlights come from John Leguizamo as a ballplayer's agent, and Ellen Barkin as a radio sports announcer.