Mark Johnson, the United States boxer, is not listed in the latest monthly rankings, but has previous ranking records, with the latest entry from March 2006 in the Bantamweight 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 Bantamweight | May 2004 | May 2004 | 1 month |
| Bantamweight | June 2001 | March 2006 | 1 year 2 months |
| Super Flyweight | December 1998 | September 2005 | 4 years 8 months |
| Flyweight | June 1993 | November 1998 | 5 years 6 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.