From: Christian Brothers' College/South Melbourne
Number: 15 (1932)
Games: 2 (21 total)
Goals: 0 (5 total)
After a season with the Melbourne Seconds, McMahon was cleared back to South Melbourne in June 1933 but failed to add to the 19 games he'd played for them between 1927 and 1931, and joined South Melbourne Districts.
He later served on the South Melbourne committee and later lived in Papua New Guinea.
Served in the Army during World War II.