2011 Preakness Stakes

Jockey Jesus Castanon poses for a photo aboard Shackleford in the winners circle after winning the 136th running of the Preakness Stakes at Pimlico Race Course on May 21, 2011 in Baltimore, Maryland.

Shackleford (5), ridden by Jesus Castanon, moves through the finish line to win the 136th Preakness Stakes horse race at Pimlico Race Course, Saturday, May 21, 2011, in Baltimore. Animal Kingdom, behind, ridden by John Velazquez, took second place.

Jockey Jesus Castanon riding 'Shackleford' celebrates as he crosses the finish line in first place in the 136th running of the Preakness Stakes at Pimlico Race Course on May 21, 2011 in Baltimore, Maryland.

Shackleford crosses the finish line — AP Photo/Jim Dietz

Shackleford, ridden by Jesus Castanon, crosses the finish line to win the 36th Preakness Stakes horse race at Pimlico Race Course, Saturday, May 21, 2011, in Baltimore.

Shackleford, right, with Jesus Castanon aboard, crosses the finish line to win the 36th Preakness Stakes — AP Photo/Mike Stewart

Shackleford, right, with Jesus Castanon aboard, crosses the finish line to win the 136th Preakness Stakes horse race at Pimlico Race Course, Saturday, May 21, 2011, in Baltimore. Animal Kingdom, with John Velazquez aboard, took second place.

Shackleford wins Preakness — Getty Images/Patrick Smith

Jockey Jesus Castanon riding 'Shackleford' celebrates as he crosses the finish line in first place in the 136th running of the Preakness Stakes at Pimlico Race Course on May 21, 2011 in Baltimore, Maryland.

Spectators with wide-brimmed watch the James W. Murphy Stakes from Turfside Terrace at Pimlico Race Course, Saturday, May 21, 2011, in Baltimore. The Murphy Stakes race is an undercard to the Preakness Stakes.

Preakness Stakes horse race entrant Mucho Macho Man is bathed outside the Stakes Barn at the Pimlico Race Course in Baltimore on Friday, May 20, 2011. Mucho Macho Man is set to run in the 136th Preakness Stakes race on Saturday.

Preakness Stakes horse race entrant Shackleford walks on the track at the Pimlico Race Course in Baltimore on Friday, May 20, 2011. Shackleford is set to run in the 136th Preakness Stakes race on Saturday.

Kentucky Derby winner and Preakness Stakes hopeful Animal Kingdom, ridden by David Nava, heads to the training track at Fair Hill Training Center in Elkton, Md., Friday, May 20, 2011.

Mr. Commons moves to the track for a workout — AP Photo/Patrick Semansky

Preakness Stakes horse race entrant Mr. Commons with Frankie Herrarte aboard moves to the track for a workout at the Pimlico Race Course in Baltimore on Friday, May 20, 2011. Mr. Commons is set to run in the 136th Preakness Stakes race on Saturday.

Preakness entrant Mucho Macho Man chews on hay in the Stakes Barn at the Pimlico Race Course in Baltimore on Wednesday, May 18, 2011. Mucho Macho Man, trained by Kathy Ritvo, is set to run in the 136th Preakness Stakes race on Saturday.

Post position drawings — AP Photo/Garry Jones

Susan Faber, right, of Baltimore, places the Kentucky Derby winning entrant Animal Kingdom into the 11th position during the post position draw for the Preakness Stakes horse race at Pimlico Race Course in Baltimore on Wednesday, May 18, 2011.

Preakness entrant Dance City is walked to the barn after arriving at Pimlico Race Course on May 18, 2011 in Baltimore, Maryland. The 136th running of the Preakness Stakes will be run on Saturday.

Preakness entrant Mr. Commons is grazed by hot walker Francisco Lael outside the stakes barn after arriving at Pimlico Race Course on May 18, 2011 in Baltimore, Maryland. The 136th running of the Preakness Stakes will take place on Saturday.

Dialed In arrives behind Shackleford — AP Photo/Jim Dietz

Preakness entrants Dialed In, left, arrives behind Shackleford at Pimlico Race Course in Baltimore on Wednesday, May 18, 2011. Dialed In, trained by Nick Zito, and Shackleford, trained by Dale Romans, are set to run in the 136th Preakness Stakes horse race on Saturday.

Preakness entrant Shackleford stands in the Stakes Barn after arriving at Pimlico Race Course in Baltimore on Wednesday, May 18, 2011. Shackleford, trained by Dale Romans, is set to run in the 136th Preakness Stakes horse race on Saturday.

Exercise rider David Nava takes Kentucky Derby winner and Preakness entrant Animal Kingdom over the track at the Fair Hill Training Center on May 17, 2011 in Elkton, Maryland. Animal Kingdom is training for Saturday's 136th Preakness Stakes in Baltimore.

Kentucky Derby winner and Preakness entrant Animal Kingdom gets a bath after training at the Fair Hill Training Center on May 17, 2011 in Elkton, Maryland. Animal Kingdom is training for Saturday's 136th Preakness Stakes in Baltimore.

Kentucky Derby winner Animal Kingdom with David Nava aboard gets a morning workout at the Fair Hill Training Center on Monday, May 16, 2011 in Fair Hill, Md. Animal Kingdom and his trainer Graham Motion are preparing for the 136th Preakness Stakes race Saturday in Baltimore.