sentences:  He stayed close to the Los Angeles area as a referee, so he could pursue his career in the movie industry during this period.After gaining a decade of experience as a referee, Callahan simultaneously worked as a boxing judge for over 100 fights mostly in the Los Angeles area, including four state championships, between 1941 and 1960.On October 9, 1937 Callahan was scheduled to box in a benefit exhibition at Legion Stadium in Los Angeles for Wad Wadheim, a fight promoter who had suffered a stroke.