Jimmy Shamus Obrien, the United States boxer, is not listed in the latest monthly rankings, but has previous ranking records, with the latest entry from February 1945 in the Light Heavyweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Light Heavyweight | January 1945 | February 1945 | 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.
