Before the UFC
John Oskar Hammer makes their UFC debut
Our striking, grappling, and schedule metrics are measured from UFC fights, so they come online after this bout. Here is the career they bring in — and how live the opposition has been.
Pre-UFC opposition
Opponents' combined record
64-40-2
.615 win rate
Winning-record opponents
2 of 2
carried winning pro records
Pro bouts faced
4
2 opponents with records on file
A descriptive read of the non-UFC slate from opponents’ full career pro records — not a UFC-grade Schedule Score.
UFC fight history
No UFC bouts on record yet.
Outside the UFC
across 4 bouts · 4 promotions · wins by 1 KO · 3 subIE 3 · EVT 3 · EVT 2 · BOC 1
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| W | Bernardo Serrini | Submission | Choke | R1 | 0:20 | IE 3 | Mar 19, 2005 |
| W | Xavier Foupa-Pokam32-22 | Submission | Rear-Naked Choke | R2 | 3:09 | EVT 3 | May 22, 2004 |
| W | Krzysztof Kulak32-18-2 | KO/TKO | Punches | R2 | 2:46 | EVT 2 | Apr 4, 2004 |
| W | Carl Knudsen | Submission | Rear Naked Choke | R1 | 1:03 | BOC 1 | Sep 6, 2003 |
Non-UFC bouts (regional/other promotions) — shown for context only, excluded from Schedule Score, striking/grappling rates, and every UFC-scoped metric.
Amateur
1-0across 1 amateur bout · 1 promotionSSF
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| W | Daniel Atterhagen | Decision | Unanimous | R1 | 6:00 | SSF | May 31, 2003 |
Amateur (pre-professional) bouts — shown for context only and excluded from the professional record and every UFC-scoped metric.