Joseph Muller was a French professional road bicycle racer. He rode and finished the Tour de France from 1920 to 1924, winning one stage in the 1923 Tour de France and finishing 6th in the 1924 Tour de France. In the yellow jersey at the 1923 Tour de France after stage 12 — 1 stage, July 16 to July 17, taking it from Henri Pélissier. Wiki link