UPDATE: The Illustration Friday topic this week is MIGHT, coincidentally. Read on:
Sometimes, no matter how much cardio you do, the gut remains. Sometimes, you have a gut because you don't do cardio. Maybe you don't do cardio because you don't expect the fight to last more than a round or two. Have you given up, and just showing up for a meager payday? You don't need to be in shape to pad some other guy's record.
Or, you MIGHT decide you aren't a tool, and throw the left hook with abandon.