Omaha Beach was the morning-line favorite at 4-1.
Omaha Beach reportedly was coughing Wednesday morning, and an examination revealed an entrapped epiglottis - a breathing obstruction that compromises a horse's ability to breathe during exercise.
The trainer told the Associated Press that Omaha Beach will have surgery in Kentucky in the next few days and will be sidelined for two to three weeks.
Omaha Beach's owner, Rick Porter, said veterinarians tried to fix the colt's problem on Wednesday, but determined Omaha Beach would need minor surgery.
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Kentucky Derby 2019 longshot picks: By My Standards, Plus Que Parfait and Spinoff are horses to watch. Mandella told the Daily Racing Form that Omaha Beach developed a cough, "which made us suspicious", so they had him scoped and the entrapped epligottis was discovered.
It's not the first time the Derby has lost a favorite leading up to the race. "We found an entrapped epiglottis".
Like Roadster, Game Winner and Improbable are trained by Baffert, who's seeking his record-tying sixth Kentucky Derby victory after winning with Justify previous year. "We'll have to figure out a whole new game plan". With the colt's withdrawal, all the entrants in gates 13 through 20 moved one to the left and Bodexpress entered in the outside post.
Omaha Beach galloped Wednesday morning without problem and Mandella said everything was fine.
In 2009, I Want Revenge became the first morning-line favorite to scratch the day of the race because of a hot spot on his ankle.
Tacitus also won the Tampa Bay Derby (G2), however, this race has also not been the most productive prep for horses looking to win the Kentucky Derby. NBC will televise the race.