SELECT COUNT(jockey) FROM table_14981555_3 WHERE race = "Sir Rupert Clarke Stakes"
CREATE TABLE table_14981555_3 (jockey VARCHAR, race VARCHAR)
มีจ๊อกกี้กี่คนที่ลงแข่งขันที่ Sir Rupert Clarke Stakes
How many jockeys are listed running at the Sir Rupert Clarke Stakes?