John David Jackson, the United States boxer, is not listed in the latest monthly rankings, but has previous ranking records, with the latest entry from March 1997 in the Middleweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Middleweight | September 1993 | March 1997 | 3 years 7 months |
| Super Welterweight | September 1989 | August 1993 | 4 years |
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.
