Mattress Mack donates $500,000 to cancer research
Mattress Mack' wins $75M as Astros claim World Series title
Back at it: Jim 'Mattress Mack' McIngvale donates even more money
Mattress Mack donates $500,000 to cancer research
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Mattress Mack loads $10 million of Astros winnings into wheelbarrow
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Who is this 'Mattress Mack,' and why does he do what he does
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