Del Mar Darling, a 3-year-old filly by Misremembered, was euthanized after suffering an injury during the running of Friday's fourth race, a sprint for maiden claimers.

Del Mar Darling (11-1) was racing in the clear on the turn when she fell, unseating jockey Tyler Conner who was not injured. Del Mar Darling was winless in three starts, including a third at Los Alamitos on Dec. 3 in her debut.

The race was won by Strike At Daylight ($34).