Coulon was not only a topnotch trainer, but living boxing history. He was a close friend of Jack Johnson, had frequented Johnson's restaurant, the "Café de Champion," and served as a pallbearer at the great champion's funeral. He knew every heavyweight champion since the Great John L. Sullivan, trained hundreds of fighters and was a revered celebrity in Chicago during the 1960s. At 76 he could leave a ring by jumping over a top rope, landing softly on his feet. He celebrated a birthday by walking the length of the gym on his hands. He died at 84 in 1973 in Chicago and was buried in St. Mary's Cemetery along with his wife. His gym was later torn down. In 2016 all rights to the boxer was given to a relative by the name of Brenden Wirth.