Kentucky Derby Thoroughbred Owes It All to Tiger Woods' #1 Mistress

Tiger Woods could be a player in this year's Kentucky Derby if a horse named Suddenbreakingnews manages to win, place or show.

Experts say the 3-year-old thoroughbred has an outside shot at taking it all on Saturday -- and if he does, get ready to hear the name Rachel Uchitel, repeatedly. Turns out a mare named Uchitel birthed Suddenbreakingnews.

Sbn is currently at 20-1 odds -- kinda middle of the pack -- to win, and has already overcome 2 big hurdles ... his balls. Or lack thereof.

Kitty Taylor -- who brokered the $72,000 sale of Suddenbreakingnews -- says the horse is a gelding ... meaning his testicles were removed, since they never dropped. We're told it's really rare for a gelding to make it as far as the Derby.

Taylor adds, "Perhaps Tiger should have been gelded at some point."