Playing as a fullback, he was selected by Walter Eckersall to the 1910 All-Western college football team.
[1] Exelby served as the head football coach at the University of Wyoming for one season in 1912, compiling a record of 2–7.
He was also Wyoming's head basketball coach that academic year, 1912–13, tallying a mark of 2–5.
Exelby died on September 29, 1962, in Owosso, Michigan.
[2] # denotes interim head coach # denotes interim head coach