Jack Sharkey, the United States boxer, is not listed in the latest monthly rankings, but has previous ranking records, with the latest entry from August 1936 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 | January 1928 | August 1936 | 5 years 9 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.