Duke of Doom (#4, ML 5-1) returns in Friday's sixth race at Golden Gate, a 1 1/16-mile claiming race on the all-weather track. It will be his first start since finishing third by a half-length in a claiming race July 30 at Santa Rosa. The first-, second-, and fourth-place finishers from that race came back to win their next starts. Get the Key Race report as part of DRF Plus. Sign up for DRF Plus here.