Billy Conn, the United States boxer, is not listed in the latest monthly rankings, but has previous ranking records, with the latest entry from August 1946 in the Heavyweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Heavyweight | June 1941 | August 1946 | 2 years 3 months |
| Light Heavyweight | December 1937 | May 1941 | 2 years 9 months |
| Middleweight | April 1937 | November 1937 | 8 months |
Time ranked counts distinct months this fighter appears on a rankings list for that division. If they drop out and return later, months off the ranking lists are not included.