Jockey Gary Stevens announced Thursday that jockey Southern California-based jockey Corey Black will replace Harry Hacek as his agent following this weekend's racing."It's confirmed," said Stevens, a Hall of Fame member who recently returned from retirement. "Corey's going to ride through the weekend, and then he's going to begin as my agent. I'm excited about it."As a jockey, the 31-year-old Black has won 1,523 races and earned nearly $54 million in purses."Corey loves stats, and he gets along with everybody," said Stevens. "He's very enthusiastic and knows what I want. I've ridden with him for 15 years. He knows my temperament also and can deal with that."Through Wednesday, Black had won one race in 18 starts on the current Hollywood Park meet. He has also worked as an analyst for Television Games Network.Hacek had handled Stevens' book for several years.