I had had enough and I quit, and there is a distinction…You retire when the game has had enough of you. You quit when you have had enough of the game. Mercury Morris More Quotes by Mercury Morris More Quotes From Mercury Morris In practice, I run every play like I'm scoring a touchdown. Mercury Morris practice play running I started out in a kid’s backyard playing touch football and I never abandoned the principle when I got to the pros: if they can’t touch you, they can’t tackle you. Mercury Morris principles football kids