Michael Nunn is outside the current major-body rankings. His most recent ranking was June 2002 in the Cruiserweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Cruiserweight | May 2002 | June 2002 | 2 months |
| Light Heavyweight | June 1995 | October 2000 | 4 years 1 month |
| Super Middleweight | October 1991 | March 1997 | 4 years 8 months |
| Middleweight | September 1986 | September 1991 | 4 years 4 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.