The Magilla Gorilla Show (1964)

S1E4 Gridiron Gorilla

Frustrated by a string of losses, a coach decides to acquire Magilla for his football team. With Magilla shining as the team's standout player, they start to turn their season around. However, when a rival team learns about Magilla’s preferred snack, they exploit this knowledge to outsmart and beat the team. Consequently, Magilla ends up being returned to the pet store.