The casino alleges in a civil complaint filed yesterday in a Nevada state court that Barkley failed to repay four $100,000 casino markers received last October.
In a radio interview with sports station WJOX in Birmingham, Ala., Barkley repeatedly blamed himself for letting the debt lapse.
He says it stems from a wager on the 2008 Super Bowl and did not explain why Wynn alleges the loans were made in October.
Barkley, currently a basketball analyst for Turner Network Television, denies any personal financial problems, and says all the casino had to do was call him before filing the complaint.
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