Exercise rider Daragh O’Donohue guides Kentucky Derby entrant Thunder Snow during a morning gallop at Churchill Downs in Louisville, Ky., Tuesday, May 2, 2017. Thunder Snow bucked out of the gate on Saturday, May 6, 2017, and did not finish the race.
Exercise rider Daragh O’Donohue guides Kentucky Derby entrant Thunder Snow during a morning gallop at Churchill Downs in Louisville, Ky., Tuesday, May 2, 2017. Thunder Snow bucked out of the gate on Saturday, May 6, 2017, and did not finish the race. Garry Jones AP
Exercise rider Daragh O’Donohue guides Kentucky Derby entrant Thunder Snow during a morning gallop at Churchill Downs in Louisville, Ky., Tuesday, May 2, 2017. Thunder Snow bucked out of the gate on Saturday, May 6, 2017, and did not finish the race. Garry Jones AP