The Kentucky Derby purse is now $5 million and offers one of the biggest potential paydays for jockeys in the field

The 151st Kentucky Derby headed to the post Saturday with the prospect of a wet track, an open slot in the starting gate and no firm favorite. Aside from the potential weather, the race shaped up as an entertaining and potentially lucrative wagering opportunity -- and a chance for one or more of the 19 3-year-olds to separage toward eventual stardom.

The most prestigious event in horse racing is here: the Kentucky Derby. Racing fans and celebrities alike flock to Churchill Downs for the annual event that kicks off the Triple Crown. The Kentucky Derby features the best 3-year-old male Thoroughbred horses the world has to offer.