John Duplessis, the United States boxer, is not listed in the latest monthly rankings, but has previous ranking records, with the latest entry from February 1991 in the Super Lightweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Super Lightweight | December 1990 | February 1991 | 3 months |
| Lightweight | January 1990 | November 1990 | 11 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.
