 He was born in Berkeley, California, and died in Castro Valley, California.Between mid-1931 and 1936, Mailho played for the Oakland Oaks in the Pacific Coast League, hitting over .300 each year, except for an injury shortened 1934 season.When called up by the Athletics, Mailho was mostly used as a left-handed pinch hitter by manager Connie Mack, although he appeared in one game as an outfielder.