It is with great sadness that Karen O'Connor's pony Theodore O'Connor has passed away.
The injury occurred after the pony was spooked while walking to the arena for a morning workout.
"Teddy got frightened and bolted. He slipped running back to the barn and suffered a severe laceration to his hind leg, severing the tendons and ligaments," said the O'Connors in a statement.
"Dr. A Kent Allen was on the scene immediately, and it was determined after examination that the injuries were catastrophic. Everyone who knew Teddy is devastated."
Teddy was ridden by Karen O'Connor. He defied his tiny size to finish third at Rolex Kentucky in 2007 and sixth this year.
The 13-year-old also won team and individual gold medals at the Pan American games last year and was on the short-list for the American team at this year's Olympics in Hong Kong.
To send thoughts to Teddy's connections please email Teddy@usef.org and USEF will pass on messages.