INGLEWOOD, Calif. (AP) -- Mike Mitchell, the all-time leading trainer at Del Mar, will have surgery on Friday to remove a brain tumor that was diagnosed earlier this week.

Mitchell's wife Denise says the 64-year-old trainer was admitted to USC Medical Center on Wednesday. She says the family is hopeful that doctors can remove the tumor and then run tests to determine if it is malignant or benign.

Mitchell's most recent victory came last Saturday in the Hollywood Oaks with Potesta at Betfair Hollywood Park. Among his Grade 1 winners are Ever a Friend, Romance is Diane and Monzante.

He has 2,595 career victories and has earned more than $62 million in purses. Mitchell is the third-leading trainer all-time at Hollywood.

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