Online Kentucky Derby betting for many people begins the horse racing season. There are many gamblers that don’t even look at horse racing until the Kentucky Derby. For them it all starts in early May with Kentucky Derby betting. Online Kentucky Derby betting begins the Triple Crown and that is definitely part of the appeal. The Derby is the first race with the Preakness and Belmont to follow. Only eleven horses have won the Triple Crown and none have done it since Affirmed back in 1978. Eventually a horse will break the Triple Crown drought but people keep saying that every year.