Only Thoroughbreds have won the Kentucky Derby because the race is only open to registered Thoroughbreds, age 3.
Calvin Borel won the 2009 Preakness Stakes on Rachel Alexandra.
Lookin At Lucky!!my pick for the Derby and Preakness
The winner of Preakness stakes 2014 was California Chrome.
The filly Rachel Alexandra won the Preakness in 2009. She is also known as 'the superfilly.'
Calvin Borel a jockey wouldve won on 2 different horses Mine That Bird-1st in the Derby and Rachel Alexandra-1st in the Preakness but MTB fell short and placed 3rd in the Belmont
Glen Boss
the most wins for anyone-trainer, jockey, or owner is Calumet Farms has won with 8 of there horses (horses can only race once as a 3 yro)
Twice
Big Brown.
looking at lucky
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Snow Chief