Beginning today, September 6th, Papa Johns is giving away 1,000,000 free large one topping pizzas. It will be 60,000 pizzas per week all NFL season.
All you have to do to enter is be part of their Papa Rewards Club. If you are a winner they will deposit 20 points into your account (a free large pizza is 20 points).
Last year during the Super Bowl they offered to give away large pizzas if there was a tie to all their Rewards Club members, so you might already have an account!