Longtime Northern California racehorse trainer John F. "Mickey" Martin has passed away at the age of 63 after a lengthy illness, according to a press release from Golden Gate Fields. Martin, who saddled his first starter in 1984, trained Quarter Horses early in his career before transitioning to Thoroughbreds. He campaigned over 2,300 winners. From 7,707 Thoroughbred starters, Martin won 1,960 races and amassed purse earnings of $23,835,366. "With the recent passing of Duane Offield and now John, it's been a rough couple of weeks," said Golden Gate Fields Vice...