Phil Weston, portrayed by Will Ferrell, is an ordinary man who has endured a lifetime of his father Buck Weston's (Robert Duvall) fierce competitiveness, leaving him with deep-rooted emotional scars. Now in his middle years, Phil is married to Barbara Weston, and they have a young son named Sam. Phil runs a small vitamin store while Buck reigns over a successful chain of sporting goods stores. The family dynamics grow even more complex with the presence of Janice Weston (Musetta Vander), Buck's second wife, who shares the same life milestones as Phil's marriage to Barbara, having given birth to her son simultaneously.
Buck is the head coach of the Gladiators, the top little-league soccer team in the area, where Sam is a player. Frustratingly for Phil, Buck often sidelines Sam during games, a humiliation that echoes Phil’s own childhood experiences. Ultimately, Buck transfers Sam to the Tigers, a team struggling to find its footing in the league.
At Sam’s inaugural game with the Tigers, with their regular coach absent, Phil steps in to coach the team full-time. Unfortunately, despite his enthusiasm, the team's performance does not improve. In a bid to turn things around, Phil enlists the help of Mike Ditka, his father's neighbor and rival, who agrees to become the assistant coach as a chance to best Buck. Despite their rigorous training, victories remain elusive. However, the introduction of two gifted Italian brothers, Gian Piero and Massimo, sons of a local butcher, revitalizes the Tigers. Their prowess leads to an unexpected winning streak, positioning the team as potential champions.
As the competition heats up, Phil and Buck make a bet: if the Gladiators win, Phil will sell his store and work for Buck. But if the Tigers triumph, Buck must return Phil's childhood treasure, the 'Pelé Ball', which Buck had taken from him years ago. Fueled by newfound caffeine-fueled bravado, Phil's demeanor shifts from a gentle parent to a pushy, overly competitive coach, mirroring the very traits he once detested in Buck. The mantra for the team becomes "Get the ball to the Italians," which, while effective, demoralizes the other players. In a misguided display of competitiveness, Phil benches his own son, Sam, during the crucial semi-finals.
The championship match pits the Tigers against the Gladiators. By halftime, the Gladiators are leading 2-1. However, during a heartfelt conversation with Sam, Phil has an epiphany regarding his harsh coaching methods. He instructs the team to abandon his prior strategies. Despite the Gladiators scoring again, the Tigers rally back, with Ambrose managing to close the gap at 3-2. A crucial goal ties the game, and during a spectacular team effort, Sam scores the decisive goal against his uncle Bucky (Josh Hutcherson), sealing a stunning 4-3 victory.
In the aftermath, Phil seeks forgiveness from Ditka for his previous behavior, which Ditka graciously accepts. Although Buck attempts to honor their bet by giving Phil the Pelé Ball, Phil elects to decline, choosing instead to reconcile and collaborate with his father, emphasizing the importance of family over rivalries.
The film concludes with a humorous nod to competition as it features an updated version of Buck’s commercial, showcasing the merger of Phil's vitamin business, Phil's Pills, and Buck's Sporting Goods Store. The entire Tigers team joyfully proclaims, "And vitamins," after echoing the tagline, "He's got balls." In amusing fashion, Mike Ditka is seen critiquing the commercial as the credits roll.
