Worth was an American Thoroughbred

Thoroughbred

The Thoroughbred is a horse breed best known for its use in horse racing. Although the word thoroughbred is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed...

 race horse

Horse racing

Horse racing is an equestrian sport that has a long history. Archaeological records indicate that horse racing occurred in ancient Babylon, Syria, and Egypt. Both chariot and mounted horse racing were events in the ancient Greek Olympics by 648 BC...

. He was the winner of the 1912 Kentucky Derby

Kentucky Derby

The Kentucky Derby is a Grade I stakes race for three-year-old Thoroughbred horses, held annually in Louisville, Kentucky, United States on the first Saturday in May, capping the two-week-long Kentucky Derby Festival. The race is one and a quarter mile at Churchill Downs. Colts and geldings carry...

, as well as the Chesapeake Stakes and Latonia Handicap. He was the top racehorse, based on earnings, in 1911 and became a U.S. champion in 1912.

On November 6, 1912, Worth was severely injured during a race run at the Pimlico Race Course

Pimlico Race Course

Pimlico Race Course is a horse racetrack in Baltimore, Maryland, most famous for hosting the Preakness Stakes. Its name is derived from the 1660s when English settlers named the area where the facility currently stands in honor of Olde Ben Pimlico's Tavern in London...

 in Baltimore, Maryland. Worth's jockey, MacTaggart, rode too closely to another horse, causing a three horse collision that severely injured two other jockeys and severed two tendons in Worth's leg. Worth was euthanized shortly after this incident due to his extensive injuries.