Jackie Brown has ranking history, with the latest entry from August 1939 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 |
|---|---|---|---|
| Bantamweight | August 1936 | August 1939 | 9 months |
| Flyweight | August 1931 | November 1938 | 4 years 5 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.