(CNN) Houston furniture mogul Jim "Mattress Mack" McIngvale had a lot riding on Game 7 of the World Series, whether his beloved Astros won or lost.

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They did end up losing 6-2 to the Washington Nationals on Wednesday and McIngvale says he lost about $13 million that he bet on the Astros to win it all.

Despite the huge amount involved, McIngvale told CNN that he's not a big gambler -- the mega bets were more of an insurance policy.

He had promised to give customers who spent more than $3,000 on certain mattress purchases a full refund if the Astros won the World Series.

McIngvale said that if the Astros had won, his winnings would have covered the cost of his customers' free mattresses.

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