Gun Runner won Saturday's Breeders' Cup Classic at Del Mar, after dueling for the lead with Collected for almost the entire race.
Collected finished second and was followed by West Coast, War Story and Arrogate.
Gun Runner won the 1 1/4 mile dirt stakes in 2:01.29. Florent Geroux rode Gun Runner for trainer Steve Asmussen.
Gun Runner was the 2-1 second betting choice and Arrogate was the 9-5 favorite in the 11-horse field
Arrogate, in post 1, took an awkward step coming out of the gate and was never in contention.
Arrogate won las t year's Breeders' Cup Classic at Santa Anita.
Prior to Saturday's race, trainer Bob Baffert said it would be the last for the 4-year-old Arrogate.
The Breeders' Cup win was the fourth in a row for GHun Runner--all in Grade 1 stakes.
The victory almost guarantees that Gun Runner will win the 20217 Eclipse award as Horse of the Year.