Let me tell you what happens when you fumble a ball on a team coached by Bill Belichick.
After the game, Belichick has the trainers strip you down to a naked state and they shave every hair on your body below the neck. They then force you into women's clothing, complete with six inch heels. Then you have a heart shaped tattoo put on your back with the word "fumbler" underneath in pink cursive ink. You then have to spend the next few days shashaying around the locker room offering your "services" to the other players and singing over and over again in a falsetto voice "I'm a fumbler and that's okay, I tumble all night and I fumble all day..."
Once you get three fumble tattoos, you are off the team permanently.
After undergoing that rite of humiliation, you might better understand why so few Patriot players fumble the ball.
After fumbling a deflated cheater ball...