Through Sunday, Flavien Prat and Doug O'Neill lead the jockey and trainer standings at the spring-summer meeting.
Prat has won 13 races, two more than Geovanni Franco, who is riding in California for the first time this year. Joe Talamo, Asa Espinoza and Mario Gutierrez are tied for third with nine winners.
O'Neill, who won six races last week, has won 12 races and had a three-race lead on Phil D'Amato. Peter Miller is a close third with eight wins, one more than David Jacobson and Mike Puype.