In the late-1800s and early-1900s, Zellmer Pettet was a student at the University of Chicago where he was a member of both the football and track teams. At the 1904 St. Louis Olympics dozens of handicap non-medal track and field events were contested alongside the “true” Olympic events. Pettet competed in two of these, the high jump and the long jump, both billed as Olympic Irish sports, where he finished third in each event. In 1940 Pettet worked for the Bureau of the Census at the United States Department of Commerce where he was the chief statistician for agriculture.