[1] At five feet, 11 inches, and 190 pounds, O'Shaughnessy enrolled at the University of Michigan in 1950 and played on the freshman football team that fall.

[2] As a sophomore and junior, O'Shaughnessy started all but five of 18 games, having been injured, at the center position for the 1951 and 1952 Michigan Wolverines football teams,[3][4] playing 267 and 251 minutes respectively.

[5] At the end of the 1952 season, he was selected by the United Press as the center on the All-Big Ten football team.

After being discharged from the Air Force in 1959, O'Shaughnessy began a career as a teacher and football coach at The Hill School.

[1] O'Shaughnessy and his wife, Winifred, had seven children, born between 1955 and 1965: Timothy, Susan, Patrick, Ellen, Andrew, Mary and Ann.