The history of Super Bowl prop betting
William Perry The Fridge Chicago Bears NFL Football Vintage Original Poster Marketcom 1986
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How William 'Refrigerator' Perry changed football - Banner Society
Super Bowl Props: How These Side Bets Became So Popular - PROPS
William 'The Refrigerator' Perry's Super Bowl touchdown remembered, NFL News
Why Do We Have All The Fun Super Bowl Prop Bets? Thank Chicago Bears William Refrigerator Perry!
Props rule the day for Super Bowl at Vegas sports books
How William 'The Refrigerator' Perry started the Super Bowl prop bet craze
Super Bowl 56: William Perry and the prop that started a betting craze
Super Bowl Props: How These Side Bets Became So Popular - PROPS
The 49 Most Iconic Super Bowl Moments of All Time
Super Bowl 56: William Perry and the prop that started a betting craze