Young Jack Thompson is outside the current major-body rankings. His most recent ranking was October 1931 in the Welterweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Welterweight | July 1928 | October 1931 | 3 years 1 month |
| Super Lightweight | January 1928 | April 1928 | 2 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.