Swing That Cheer (movie, 1938)

Undeniably talented on the gridiron, Bob Potter is equally undeniably an arrogant pain in the posterior. So swell-headed does Potter become that he can never admit to himself that his blocking-back teammate Larry Royal is equally responsible for Bob's success. To teach his pal a lesson, Larry feigns an injury and pulls out of the Big Game, forcing Bob to have a go at it alone.