Since the beginning of this decade, there have been 13 instances in which jockeys have won five or more Thoroughbred races at Del Mar, Los Alamitos, or Santa Anita.
Juan Hernandez has accounted for four of those milestones, including a five-win day at Santa Anita on Thursday.
Hernandez, 32, won the third race before prevailing in four consecutive races from the fifth through eighth. He previously had a five-win day at Del Mar on Dec. 1 and rode five winners at Santa Anita on Jan. 4.