William Osborne
UFC DebutNickname“Nasty”
Record
Streak
L1
Age
Date of birth
- Fighting out of
- Marshalltown, Iowa
- Born
- United States
- Weight class
- Featherweight
- Height
- 6'0" · 183 cm
Before the UFC
William Osborne 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
ModerateOpponents' combined record
123-133
.480 win rate
Winning-record opponents
5 of 10
carried winning pro records
Pro bouts faced
11
10 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 11 bouts · 6 promotions · wins by 2 KO · 3 sub · 1 decAFC · WWFC · ACL 4 · Ignite Fights · RFA 10 +1
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | Nick Aguirre10-3 | Submission | Rear-Naked Choke | R1 | 4:22 | ACL 4 | Jul 27, 2024 |
| W | Andres Murray7-12 | Submission | Rear-Naked Choke | R2 | 1:37 | Ignite Fights | Oct 21, 2023 |
| W | KO/TKO | Strikes | R1 | 2:48 | AFC | Nov 13, 2021 | |
| L | Jessy Ebrecht3-13 | Decision | Split | R3 | 5:00 | AFC | Mar 7, 2020 |
| W | Adem Mujakic12-18 | KO/TKO | Strikes | R1 | 4:02 | AFC | Dec 21, 2019 |
| L | KO/TKO | Punches | R3 | 2:16 | AFC | Mar 31, 2017 | |
| W | Tony Crowder8-26 | Submission | Rear-Naked Choke | R1 | 4:12 | WWFC | Jan 17, 2015 |
| L | Justin Morrison11-8 | Submission | Armbar | R2 | 3:01 | WWFC | Feb 8, 2014 |
| L | Darrick Minner27-15 | Decision | Unanimous | R3 | 5:00 | RFA 10 | Oct 25, 2013 |
| W | Nate Williams33-24 | Decision | Unanimous | R3 | 5:00 | WWFC | Jul 13, 2013 |
| W | Eldis Sakanovic | Submission | Rear-Naked Choke | R1 | 1:54 | WPCF | Jun 8, 2013 |
Non-UFC bouts (regional/other promotions) and Dana White’s Contender Series — shown for context only, excluded from Schedule Score, striking/grappling rates, and every UFC-scoped metric.
Amateur
1-0across 1 amateur bout · 1 promotionWWFC
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| W | Steven Spaur0-11 | Submission | Punches | R1 | 2:06 | WWFC | Sep 8, 2012 |
Amateur (pre-professional) bouts — shown for context only and excluded from the professional record and every UFC-scoped metric.
In the news
All news →- Highlights! Jovan Leka delivers incredible debut with nasty liver kick knockout | UFC Belgrademmamania · Aug 1, 2026
- ‘Test that boy again’: Pros react to Ramazan Temirov’s nasty knockout of Steve Erceg at UFC Abu Dhabimmafighting · Jul 25, 2026
- Highlights! Newcomer Muhammad Saidov shocks Dustin Jacoby with nasty head kick TKO | UFC Abu Dhabimmamania · Jul 25, 2026
- The Vargas Dynasty represents boxing royalty – now they’re coming to take over BKB Bare Knucklebloodyelbow · Jul 24, 2026
- Highlights! Dione Barbosa steamrolls UFC newcomer with nasty standing rear-naked choke | UFC Oklahomammamania · Jul 18, 2026