Las Vegas sportsbooks big losers on opening NFL Sunday

• Sportsbooks in Las Vega took a historic beating on the opening Sunday of the NFL season.
• A large number of bettor favorites covered the spread and parlays hit at an unprecedented rate.
• "I don't remember a worse opening Sunday," said Westgate Superbook exec Jay Kornegay.
• Related stocks: MGM, WYNN, CZR, OTCPK:WIMHF, OTCPK:WIMHY.