Ridden by Jack Martin, Agile won the 1905 Kentucky Derby against two other competitors, Ram's Horn and Layson.

Following the death of Captain Samuel Brown, his son Frank bought Agile for $5,700 in the July 1906 dispersal sale of the entire racing stable.

[3] Agile sired three registered Thoroughbred offspring out of Texas-bred mares; the fillies Lady Eloise (1913), Chancy M (1915), and Katie Strand (1913).

[4] Lady Eloise is the third dam of American Quarter Horse champion Woven Web, a sibling of the Texas-bred Triple Crown winner Assault.

[5] In 1912, Agile was owned by T. Polk of San Antonio and was used as a carriage horse by the family.