In this image provided by Benoit Photo, Pin Oak Stud's...

In this image provided by Benoit Photo, Pin Oak Stud's Geaux Rocket Ride, ridden by Ramon Vazquez, cruises to victory in the $100,000 Affirmed Stakes horse race, Sunday, June 4, 2023 at Santa Anita Park, Arcadia, Calif. Breeders’ Cup Classic contender Geaux Rocket Ride was injured during a workout Saturday, Oct. 28, 2023, at Santa Anita. The 3-year-old colt appeared to stumble in mid-stretch and was pulled up by Mike Smith, the Hall of Fame jockey. He jumped off and held Geaux Rocket Ride’s right front leg until help arrived. Credit: AP

ARCADIA, Calif. — Geaux Rocket Ride was euthanized on Wednesday, four days after getting injured during a workout leading up to the Breeders’ Cup and struggling to recover after surgery.

The colt’s owner, Pin Oak Stud, posted the news of the death on social media.

It's the second death this week leading up to this weekend's Breeders' Cup at Santa Anita.

Practical Move, a contender in the $1 million Dirt Mile, collapsed on the track after a gallop Tuesday. Breeders’ Cup officials said his death was due to “a cardiac event.” A required necropsy will determine the official cause.

Geaux Rocket Ride was being pointed toward the $6 million Breeders' Cup Classic when he got hurt. He appeared to stumble and was pulled up by Hall of Fame jockey Mike Smith. He jumped off and held the 3-year-old colt's right front leg until help arrived last Saturday at Santa Anita. Smith wasn't hurt.

Geaux Rocket Ride sustained a condylar fracture. It’s a repetitive strain injury that results in a fracture to the cannon bone above the fetlock due to large loads transmitted during high-speed workouts.

Hall of Fame trainer Richard Mandella told The Associated Press via text earlier Wednesday that respected veterinarian Dr. Larry Bramlage was en route to California to look at Geaux Rocket Ride and make an evaluation.

Kentucky Derby entrant Practical Move works out at Churchill Downs...

Kentucky Derby entrant Practical Move works out at Churchill Downs Thursday, May 4, 2023, in Louisville, Ky.A horse set to run in this weekend’s Breeders’ Cup has died after a workout at Santa Anita. Practical Move was returning from a gallop on Tuesday morning, Oct. 31, when he experienced a suspected cardiac event, according to a statement from Breeders’ Cup officials. His rider wasn’t hurt. Credit: AP/Charlie Riedel

“His mind and his spirit never quit, but his body never recovered from surgery,” Pin Oak Stud wrote. “He had a very rare response post-op and he wasn't able to stand up again. He fought hard and our team of vets tried everything they could.”

Horses that can't stand are at increased risk for complications such as pressure sores, colic and pneumonia.

Geaux Rocket Ride missed the Santa Anita Derby and this year’s Triple Crown races because of a fever and a high white cell count. A few weeks ago, the colt had a temperature that interrupted his training.

But Mandella had said the colt was recovered and back on track toward the Breeders' Cup.

Kentucky Derby hopeful Practical Move stands in his stall before...

Kentucky Derby hopeful Practical Move stands in his stall before a workout at Churchill Downs Tuesday, May 2, 2023, in Louisville, Ky. A horse set to run in this weekend’s Breeders’ Cup has died after a workout at Santa Anita. Practical Move was returning from a gallop on Tuesday morning, Oct. 31, when he experienced a suspected cardiac event, according to a statement from Breeders’ Cup officials. His rider wasn’t hurt. Credit: AP/Charlie Riedel

Geaux Rocket Ride won the Haskell in July, beating Kentucky Derby winner Mage, and finished second in the Pacific Classic in September. He has three wins in five career starts and earnings of $980,200.

Pin Oak Stud said it appreciated the support it received from the public.

“We made sure he knew how loved he was,” the stable wrote. “We will miss you forever, Rocket.”

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