A winner at ages two, three and four, the son of War Front out of the Miswaki mare Greyciousness, also won three Grade 2 events, including the San Vicente and Rebel last year and the San Carlos this year. In his maiden win, he set a new track record of 1:06 4/5 for six furlongs at Santa Anita.

The Factor made his final start July 29 at Del Mar, finishing second in the Grade 1 Bing Crosby. The Bob Baffert trainee retires with a mark of 13-6-2-0, $922,180.

"The Factor showed brilliant speed and exceptional scope and quality in his three seasons on the racetrack and Lane's End is very pleased to stand this stunning horse whose pedigree will be of great interest to breeders," Farish said.