The history of Super Bowl prop betting
Super Bowl LVII prop bets on Patrick Mahomes taking early action, Betting
What is a Prop Bet? Beginner's Guide to Prop Bets
Weirdest Super Bowl betting phenomenon: The popularity of the coin toss bet
A Look Back At William Perry And The First Prop Bet In Super Bowl History
Spooky QB Futures, Mic'd Up Miller Swag, Props From the Past, and Other Bears Bullets - Bleacher Nation
Super Bowl Prop Bets, Proposition Betting
How William 'Refrigerator' Perry changed football - Banner Society
How William 'The Refrigerator' Perry started the Super Bowl prop bet craze
Super Bowl prop bets continue to gain popularity
Classic Photos of William The Refrigerator Perry - Sports Illustrated
Super Bowl 56: William Perry and the prop that started a betting craze
How William 'Refrigerator' Perry changed football - Banner Society
Cousin Sal's Super Bowl Prop Bets!