Yo-Sam Choi is outside the current major-body rankings. His most recent ranking was December 2007 in the 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 |
|---|---|---|---|
| Flyweight | July 2004 | December 2007 | 10 months |
| Light Flyweight | January 2000 | August 2007 | 4 years 7 months |
| Minimumweight | January 2001 | August 2001 | 8 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.