LIANE HANSEN, host: The largest crowd ever packed into Churchill Downs yesterday for the 137th running of the Kentucky Derby. But much of the intrigue of the 2011 derby happened behind the scenes. When Uncle Mo withdrew from the race on Friday due to a stomach ailment, he left the field with no clear favorite.</s>LIANE HANSEN, host: Twenty-three-year-old Rosy Napravnik, the sixth female jockey in derby history, rode Pants on Fire. And Animal Kingdom, a long shot with 20 to 1 odds, had an 11th hour jockey change.</s>Unidentified Announcer: They're into the stretch, and it's Shackleford with the rail...</s>LIANE HANSEN, host: Shackleford led for the majority for the mile-and-a-quarter sprint. But out of the final turn, Animal Kingdom was poised to make his move.</s>Unidentified Announcer: Animal Kingdom roaring down the center of the track. Here comes Animal Kingdom in the middle of the racetrack to grab the lead, and then it's Nehro and  Shackleford. But it's Animal Kingdom and John Velazquez to win the derby!</s>LIANE HANSEN, host: Animal Kingdom will go on to the second leg of racing's Triple Crown in two weeks, at Baltimore's Preakness Stakes.</s>LIANE HANSEN, host: You're listening to WEEKEND EDITION from NPR News.
The largest crowd ever packed into Churchill Downs Saturday for the 137th running of the Kentucky Derby, but much of the intrigue happened behind the scenes. Host Liane Hansen has an update of the final standings of the 2011 Kentucky Derby, where a horse named Animal Kingdom surged to a surprise victory.