As American as an apple is and as American as baseball is, they don’t go together. You can’t be chewing an apple at a baseball game. You’ve got to let go of the diet that day.

Kevin James’s joke plays on two icons of “Americana”—apples and baseball—to highlight how cultural symbols don’t always align with lived experience. The humor comes from the mock-serious insistence that an apple (a diet-friendly, virtuous snack) is incompatible with the indulgent rituals of attending a ballgame, where people expect hot dogs, nachos, and beer. By framing it as a rule—“You’ve got to let go of the diet that day”—James satirizes the way we compartmentalize self-discipline and treat certain social occasions as sanctioned exceptions. The line also riffs on the gap between idealized national imagery and the messy, appetitive reality of American leisure.