A horse named Wintergreen was the winner of the 1909 Kentucky Derby.
There was no Kentucky Derby on 1851. The first Kentucky Derby was run in 1875, and won by a horse named Aristides.
The Kentucky Derby is the first leg of the Triple Crown, a horse that wins the Kentucky Derby, The Preakness, and the Belmont Stakes becomes the Triple Crown Winner
The winner of the Kentucky Derby in 1964 was "Northern Dancer".
The 2008 Kentucky Derby winner was Big Brown.
The 1964 Kentucky Derby winner was Northern Dancer
The 1876 Kentucky Derby winner was Vagrant. He was ridden by jockey Bobby Swim and trained by James Williams. Vagrant was the first gelding to win the Derby.
Secretariat
Aristides won the first Kentucky Derby back in 1875.
Because it is the first race in the Triple Crown and if a horse wins it then there is a possibility for a Triple Crown winner.
The 2003 Kentucky Derby winner was Funny Cide.
The 1973 Kentucky Derby winner was SecretariatThat was Secretariat who went in to become the 9th Triple Crown Champion.