Nevada bookmakers have been taking bets since 1949, but they have never experienced anything like this past September.

On September Sundays at Las Vegas sportsbooks, bettors shook their heads in disgust, while behind the scenes in the risk rooms, bookmakers glanced at their computer screens then looked at each other with sheepish grins, asking, “Is this really happening?”

By the end of September, Nevada sportsbooks were up $80.9 million, the most ever in a single month in the state’s sports betting history.