In 1896 and 1897, Addison was selected as a halfback on the College Football All-America Team.

In 1900, Kelly served as the head football coach at the University of California, Berkeley, compiling a record of 4–2–1.

He later worked as a stockbroker in association with several Wall Street firms.

Kelly died at the age of 66 on March 23, 1942, at Roosevelt Hospital in New York City.

This biographical article relating to a college football coach first appointed in the 1900s is a stub.