Willi Quatuor has ranking history, with the latest entry from May 1969 in the Super Lightweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Super Lightweight | April 1966 | May 1969 | 2 years 9 months |
| Super Featherweight | November 1964 | May 1965 | 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.