Glossary of Racing Terms
Jack spavin: See bone spavin.
jail: Refers to the requirement that a horse who has been claimed, who next runs in a claiming race--must run for a claiming price 25% higher for the next 30 days. Commonly used in the phrase "The horse is in/out of jail."
The Jockey Club: An organization dedicated to the improvement of Thoroughbred breeding and racing. The Jockey Club in North America was incorporated Â on February 10, 1894 in New York City. The Jockey Club serves as North America's Thoroughbred registry, responsible for the maintenance of The American Stud Book, a register of all Thoroughbreds foaled in the United States, Puerto Rico and Canada; and of all Thoroughbreds imported into those countries from jurisdictions that have a registry recognized by The Jockey Club and the International Stud Book Committee.
jockey fee: Sum paid to rider for competing in a race.
jockeys' race: A race the outcome of which will hinge mostly on strategic thinking by the riders; i.e., one in which riders must pay close attention to pace to keep their horses fresh for a strong finish.
jog: Slow, easy gait.
joint: 1) The hinge between two bones in the musculoskeletal system. 2) See battery.
joint capsule: The structure that comprises the boundary to the joint space.
jumper: A steeplechase or hurdle horse.
juvenile: Two-year-old horse of either gender.