Marvin Julian Miller is the former executive director of the Major League Baseball Players Association (MLBPA) from 1966 - 1982. Under Miller’s direction, the players’ union was transformed into one of the strongest unions in the United States.
Miller, a labor economist, first started at the National War Labor Relations Board, and then moved on to the Machinist Union and the United Auto Workers. Finally, he worked his way up the United Steelworkers union to become its leading economist and negotiator. In the spring of 1966, Miller visited Spring Training camps in an effort to get selected as executive director of the MLBPA. He closely followed the joint holdout of Sandy Koufax and Don Drysdale. He was elected head of the MLBPA in 1966.