In a small New York town called Willow Falls, a new manager is needed for the Panthers, a local Little League baseball team.

When it turns out Dennis is instead assigned to play for another team, the Tigers, wife Betty assumes that Bruce will quit the coaching job, but he feels a commitment has been made and needs to be kept.

She also becomes so jealous at Doris's perceived romantic interest in Bruce that she studies baseball from a manual so she can become the team's official scorekeeper and keep an eye on him at the same time.

After a brawl breaks out between the Panthers and Tigers and continued criticism of his methods, Bruce goes to a bar with a buddy, O'Keefe, and gets tipsy.

At the next game, Bruce decides to use O'Keefe's surprisingly fast son, nicknamed "Man Mountain", and he becomes a hero in a Panther victory.