- June 27, 1935: Danno O’Mahoney defeated Jim Londos to win the NWA World Heavyweight title in Boston..
- June 30, 1935: Danno O’Mahoney defeated Ed George to win the AWA (Boston) Heavyweight title in Boston..
- ~~~Danno O’Mahoney unified both the NWA and AWA Heavyweight titles thus being named the Undisputed World champion..
- March 2, 1936: Dick Shikat defeated Danno O’Mahoney to capture the World Heavyweight title..
- November 4, 1950: Danno O’Mahoney passed away..
- A Study of Danno O’Mahoney – The (Almost) Undisputed World Champion (by Steve Yohe)..