Well, you can run and you if you’re going to play football (American or World) then you must have a good sense of centripetal balance. And guess what? Centripetal balance is a combo of good legs and core strength. I would say you should try to play cornerback (if it’s American football anyhow). You’re just going to run with the wide receiver every down and the way your body has to adjust to the ball in the air is good torso turning. Don’t be ashamed to play, just put on your survival mode hat. You will get hit, but more importantly you will hit! Follow the other players hips, nothing else. Hit their hips for tackling, or legs. Never try to tackle up high. And when tackling always have your knees bent.
As for your diet. Avoid all candy. Anything high in sugar (orange juice, and stuff like that may shock you) or anything high in sodium (chips and junk like that is unnecessary.)
Literally when I had a gut, all I was doing to battle it was drinking water, and running 3.3 miles a day 5 days a week. For me, I had to combine it with a good diet, because my body was used to being highly active and although my activity has greatly declined, my appetite hasn’t! It’s as if my body wants to store everything just because I’ve stretched my activity potential so high. Anyways I don’t know if activity potential truly exists. But I say to you, whatever activity you do, just keep active from here on out and your belly will dissipate. For your sweets, just have strawberries, oranges, mangos and etc. Stuff of that nature.
Good luck my friend.