The shot put event was held in London on July 15, 1908. The event was divided into four sections, and athletes from the University of Michigan won three of the four sections. They were Coe, Ralph Rose, and John Garrels. In the finals, Coe finished in fourth place, behind Rose, Denis Horgan, and Garrels. Coe also competed in the tug of war for the United States team in London. After the 1908 Olympics, Coe worked for a time with his father in the mining business in California. Coe later moved to Detroit, Michigan, where he was employed as a research chemist. In approximately 1916, Coe was married to Evelyn Coe, a native of Cheshire, England. They had two children. In his 1909 and 1917 U.S. Passport Applications, Coe indicated that his permanent residence was in Sommerville. In 1918, Coe was living in Lexington, Massachusetts, with his wife, and he was a partner with his father in the dye manufacturing business. At the time of the 1920 United States Census, Coe was living on Beacon Street in Boston with his wife, Evelyn, and their daughter, Jane. He listed his occupation as chemist. In a 1920 U.S. Passport application, he indicated he was employed as a chemist in the dye business and wished to travel to England for purposes of "protection of my patents". Letters submitted in support of the application indicated that Coe was in business with his father and had successes in "inventing dyes and by-products from waste materials" and was required to travel to England to protect pending patent rights. Coe also continued to compete in occasional shot put competitions into his 30s. He placed second in the shot put at the 1912 AAA championships and won the 56-pound weight event at the 1920 British Championships. In June 1926, Coe became ill and moved to Bozeman, Montana, upon advice from his physician. He worked in the chemistry profession at Bozeman and died there from Hodgkin's disease at Deaconess Hospital on December 24, 1926, at age 47. He was survived by his wife and two children, who were then living at Bournemouth, England.