Jockey Patrick Valenzuela left a San Diego hospital after undergoing treatment for depression, a lawyer said. Attorney Sam Silverstein also said medical tests showed no traces of illegal drugs in Valenzuela's system.

According to Silverstein, the jockey visited a psychiatrist three times a day during his hospital stay, in addition to participating in group therapy.

"It was a buildup of things," the lawyer added. "He's got a lot of pressure with his family, the breakup of his marriage and his compulsion to win."

Valenzuela was suspended for 60 days late last year after testing positive for cocaine. . . .

Alydar, who ran second to Affirmed in the 1978 Triple Crown races and has been a leading sire during the past decade, has undergone surgery after suffering a fractured leg, according to Kentucky's Calumet Farm.

A statement issued by the famed thoroughbred farm said Alydar kicked his stall door with his right hind leg and sustained a midshaft transverse fracture of the cannon bone. The fracture was immobilized overnight with the use of a cast and the horse's shock was reversed.

Alydar has sired such champions as 1987 Kentucky Derby and Preakness winner Alysheba, Easy Goer, Turkoman, Althea and Miss Oceana. . . .

Gary Stevens sustained a broken right elbow and Corey Nakatani and James Corral suffered mild concussions in a five-horse spill at Hollywood Park.

Stevens' mount in the first race, Rotation Speed, broke a leg and tumbled onto the track to trigger a spill that brought down Nakatani, Corral, Armando Bellido, Kent Desormeaux and their mounts.

Rotation Speed, a 3-year-old filly, was destroyed.