Derby

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Exercise rider Fernando Rivera gallops Kentucky Derby entrant Practical Joke during a morning workout for the 143rd running of the Kentucky Derby horse race at Churchill Downs Friday, May 5, 2017, in Louisville, Ky. (AP Photo/Garry Jones)

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Kentucky Derby entrant McCracken, left, ridden by exercise rider Yoni Orantes, goes out for an early morning practice run for the 143rd running of the Kentucky Derby horse race at Churchill Downs Friday, May 5, 2017, in Louisville, Ky. (AP Photo/Garry Jones)

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The sun rises at Churchill Downs before the 143rd running of the Kentucky Derby horse race Saturday, May 6, 2017, in Louisville, Ky. (AP Photo/Garry Jones)

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Mario Gutierrez rides Nyquist to victory during the 142nd running of the Kentucky Derby horse race at Churchill Downs Saturday, May 7, 2016, in Louisville, Ky. (AP Photo/David J. Phillip)

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CORRECTS LAST NAME TO GUTIERREZ FROM GUITIERREZ - Mario Gutierrez celebrates after riding Nyquist to victory during the 142nd running of the Kentucky Derby horse race at Churchill Downs Saturday, May 7, 2016, in Louisville, Ky. (AP Photo/Garry Jones)

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Todd Frazier of the Cincinnati Reds participates in the MLB All-Star baseball Home Run Derby, Monday, July 13, 2015, in Cincinnati. (Associated Press)

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Kentucky Derby and Preakness Stakes winner American Pharoah is is schooled in the paddock, Thursday, June 4, 2015, in Elmont, N.Y. American Pharoah will try for the Triple Crown when he runs in Saturday's 147th running of the Belmont Stakes horse race. (AP Photo/Julie Jacobson)

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Victor Espinoza rides American Pharoah to victory in the 141st running of the Kentucky Derby horse race at Churchill Downs Saturday, May 2, 2015, in Louisville, Ky. (AP Photo/Tim Donnelly)

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Jason Dufner and his wife Amanda are seen at the 140th Kentucky Derby Saturday, May 3, 2014 in Louisville Ky. (Photo by Joe Imel/Invision/AP)

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Rain clouds roll past Belmont Park as an exercise rider takes a thoroughbred out for a workout in the track, Wednesday, June 4, 2014, in Elmont, N.Y. Kentucky Derby and Preakness Stakes winner California Chrome will attempt to become the first Triple Crown winner since Affirmed in 1978 when he races in the 146th running of the Belmont Stakes horse race on Saturday. (AP Photo/Julie Jacobson)

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Exercise rider Willie Delgado gallops California Chrome around the track during a workout at Belmont Park, Friday, June 6, 2014, in Elmont, N.Y. The Kentucky Derby and Preakness Stakes winner will attempt to become the first Triple Crown winner since Affirmed in 1978 when he races in the146th running of the Belmont Stakes horse race on Saturday. (AP Photo/Garry Jones)

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California Chrome takes a lap, with exercise rider Willie Delgado up, during a workout at Belmont Park, Friday, June 6, 2014, in Elmont, N.Y. The Kentucky Derby and Preakness Stakes winner will attempt to become the first Triple Crown winner since Affirmed in 1978 when he races in the 146th running of the Belmont Stakes horse race on Saturday. (AP Photo/Julie Jacobson)

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Smarty Jones horse racing fans applaud as the Kentucky Derby and Preakness winner returns to Philadelphia Park Racetrack, in Bensalem Pa., Sunday, June 6, 2004, after finishing second in the Belmont Stakes on Saturday. (AP Photo/Joseph Kaczmarek)

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ADVANCE FOR WEEKEND EDITIONS, JUNE 1-2 - FILE - In this May 1, 2014 file photo, exercise rider Simon Paine takes Kentucky Derby entrant Samraat for a morning workout at Churchill Downs in Louisville, Ky. California Chrome's bid to become racing's first Triple Crown winner in 36 years isn't scaring away the competition. Horses are lining up to challenge the Kentucky Derby and Preakness winner in the Belmont Stakes next weekend. (AP Photo/Morry Gash, File)

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ADVANCE FOR WEEKEND EDITIONS, JUNE 1-2 - FILE - In this April 29, 2014 file photo, exercise rider Emerson Chavez takes Kentucky Derby hopeful Commanding Curve for a morning workout at Churchill Downs in Louisville, Ky. California Chrome's bid to become racing's first Triple Crown winner in 36 years isn't scaring away the competition. Horses are lining up to challenge the Kentucky Derby and Preakness winner in the Belmont Stakes next weekend. (AP Photo/Morry Gash, File)

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ADVANCE FOR WEEKEND EDITIONS, JUNE 1-2 - FILE - In this May 3, 2014 file photo, Victor Espinoza rides California Chrome to victory during the 140th running of the Kentucky Derby horse race at Churchill Downs in Louisville, Ky. California Chrome's bid to become racing's first Triple Crown winner in 36 years isn't scaring away the competition. Horses are lining up to challenge the Kentucky Derby and Preakness winner in the Belmont Stakes next weekend. (AP Photo/David J. Phillip, File)