The 143rd Kentucky Derby is scheduled for Saturday at Churchill Downs Saturday afternoon and what is considered to be an open field could get even more uncertain.

There's a 60% chance of rain in the forecast.

Most of the entries have never run on a wet track and that will mean a lot of unknowns if the weather forecast winds up being accurate.

The latest betting lines show four horses, Classic Empire, Always Dreaming, McCraken and Irish War Cry anywhere from 4-1 to 6-1 odds.