American Classics Kentucky Derby (2003)Preakness Stakes (2003)Belmont Stakes (2020)Barclay Tagg (born December 30, 1937, in Lancaster, Pennsylvania) is an American Thoroughbred horse trainer.

Tagg graduated from Pennsylvania State University with a degree in Animal Husbandry in 1961.

Tagg is best known for conditioning Kentucky Derby, Preakness Stakes, and Jockey Club Gold Cup winner Funny Cide.

[1] Horses in Tagg's stable have included Tiz the Law, Showing Up, and Nobiz Like Shobiz.

Formerly a steeplechase jockey, Tagg won his first race in 1972 at Old Liberty Park.