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Jim McIngvale, Houston's mattress king, bets $3.5 million on Astros - The Washington Post
Mattress Mack' makes history with $3.5 million bet on the World Series
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Mattress Mack' wins $75M as Astros claim World Series title
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Houston's 'Mattress Mack' places $3.5M bet on Astros to win World Series