Use stream of consciousness to answer the following. Mine That Bird (foaled May 10, 2006) is an American Thoroughbred racehorse who had a racing career in both Canada and the United States from 2008 to 2010. He is best known for pulling off a monumental upset, at 50-to-1 odds, by winning the Kentucky Derby in 2009. He became one of only nine geldings to win the Kentucky Derby and the second gelding to win the race since 1929. He continued to have success in the two remaining races of the American Triple Crown of Thoroughbred Racing by finishing second in the 2009 Preakness Stakes and third in the 2009 Belmont Stakes. On November 6, 2010, Mine That Bird was retired from racing after being winless in nine starts since the Kentucky Derby. He amassed $2,228,637 in earnings and won five of eighteen starts during his three-year racing career.

Answer this question based on the passage: when did mine that bird win the kentucky derby?
The relevant information is: He is best known for pulling off a monumental upset, at 50-to-1 odds, by winning the Kentucky Derby in 2009. Final answer: 2009.