Rex Tso is ranked #15 in the IBF Bantamweight rankings. He previously also ranked in the Super Flyweight 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 | March 2026 | April 2026 | 2 months |
| Super Flyweight | February 2014 | August 2018 | 4 years 7 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.
