Horse racing season has just begun at Santa Anita Park in Arcadia, and from now until April 22, SoCal hopefuls (with $5 for general admission fee) can step up to tellered windows and pick the ponies to win, place or show. But there’s a lot of history behind them horses: Santa Anita opened on Christmas Day in 1934, and still now traditionally opens on Dec. 26 each year. Seabiscuit brought the park more notoriety,......