You gotta be a man to play baseball for a living, but you gotta have a lot of little boy in you, too.

Campanella contrasts the adult demands of professional baseball—discipline, toughness, responsibility, and the pressure of performing for money—with the childlike qualities that keep the game alive: joy, curiosity, playfulness, and wonder. The line suggests that longevity and excellence in sport require more than grit; they also require preserving an inner sense of play that prevents the work from becoming purely mechanical or cynical. Coming from a catcher who managed pitchers, endured physical punishment, and navigated the high-stakes world of major-league competition, the quote underscores a balanced ideal of maturity without losing the spirit that first draws people to the game.