Flavien Prat won two of the first four races on Wednesday to move into a tie with Evin Roman for the lead in the jockey standings.
Both have won 22 races at the meeting. Prat won the third race with Lajatico ($7.60) and the fourth race with Bolster ($13.60).
There is a good chance there will be a clear leader by the end of the program.
Prat has two more mounts, including the well-regarded Abbey Vale (9) in the upcoming fifth race.
Roman has three more mounts, beginning with To the Bar (4) in the fifth race.