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Bob Baffert

Royal Mo wins his stakes debut at Santa Anita

Royal Mo wins his stakes debut at Santa Anita

Trainer John Shirreffs is back with a vengeance on the Southern California horse racing scene.

Shirreffs, the trainer of Zenyatta, the 2010 horse of the year, and Giacomo, the 2005 Kentucky Derby winner, took most of his stable to New York after Hollywood Park closed in 2013. He returned full time last year and now has two of the top 3-year-olds on the West Coast after Royal Mo scored a 3 1/2-length triumph Saturday in the $150,000 Robert B. Lewis Stakes at Santa Anita.

Royal Mo and Shirreffs’ other top 3-year-old, Gormley, are both owned by Jerry and Ann Moss, who also owned Zenyatta and Giacomo.

“It never gets old,” Jerry Moss said.

Royal Mo, a son of Uncle Mo,...