Mameluke was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 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. Bred and raced by Cornelius Vanderbilt Whitney

Cornelius Vanderbilt Whitney

Cornelius Vanderbilt Whitney was an American businessman, film producer, writer, and government official, as well as the owner of a leading stable of thoroughbred racehorses....

, he was out of the mare, Schwester, and was sired by the 1936 Epsom Derby

Epsom Derby

The Derby Stakes, popularly known as The Derby, internationally as the Epsom Derby, and under its present sponsor as the Investec Derby, is a Group 1 flat horse race in Great Britain open to three-year-old thoroughbred colts and fillies...

 winner, Mahmoud

Mahmoud (horse)

Mahmoud was an French-bred Thoroughbred racehorse who in 1936 won England's most prestigious race, the Epsom Derby and who became a Champion sire in the United States....

 who became the Leading sire in North America

Leading sire in North America

The list below shows the leading sire of Thoroughbred racehorses in North America for each year since 1830. This is determined by the amount of prizemoney won by the sire's progeny during the year...

 in 1946 and the Leading broodmare sire in North America

Leading broodmare sire in North America

The list below shows the leading Thoroughbred sire of broodmares in North America for each year since 1924. This is determined by the amount of prizemoney won during the year by racehorses which were foaled by a daughter of the sire.-----References:* *...

 in 1957.

Ridden by jockey

Jockey

A jockey is an athlete who rides horses in horse racing or steeplechase racing, primarily as a profession. The word also applies to camel riders in camel racing.-Etymology:...

 Raymond Adair, and trained by Sylvester Veitch

Sylvester Veitch

Sylvester E. Veitch was a Hall of Fame thoroughbred horse trainer.Veitch began his career in racing as a jockey and trainer in Steeplechase racing. In 1939 he moved to flat racing when he began employment as a trainer with Cornelius Vanderbilt Whitney in Kentucky...

, Mameluke won a division of the 1951 Blue Grass Stakes

Blue Grass Stakes

The Toyota Blue Grass Stakes, currently sponsored by the Toyota Motor Corporation, is an American Grade 1 horse race for 3-year-old Thoroughbreds held annually in mid April at Keeneland Racecourse in Lexington, Kentucky....

  but in that year's 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...

, the horse slowed badly before being pulled up sore and finishing last.

In 1952, Mameluke won the Metropolitan Handicap

Metropolitan Handicap

The Metropolitan Handicap, frequently called the "Met Mile," is an American Grade I Thoroughbred horse race held annually during the last week of May at Belmont Park in Elmont, New York. Open to horses age three and older, it is contested on dirt over a distance of one mile .The Met Mile was first...

  and ran third in the Suburban Handicap

Suburban Handicap

The Suburban Handicap is an American Grade II Thoroughbred horse race run annually at Belmont Park in Elmont, New York. Open to horses age three and older, it is run at the classic one-and-one-quarter mile distance on dirt for a $400,000 purse....

.