Aaron Simpson
5–5–0 · Welterweight · Age 52 · 9 UFC fights
Skill (today)
+0.50
Uncertainty (σ)
1.78
As of
2026-09-13
Skill trajectory
Line: estimated skill after each fight. Band: ±1σ uncertainty.
Fight ledger
| Date | Opponent | Result | Method | Event | Model P(win), pre-fight |
|---|---|---|---|---|---|
| 2013-03-23 | Josh Burkman | Loss | TKO | WSOF 2: Arlovski vs. Johnson | |
| 2012-10-05 | Mike Pierce | Loss | KO/TKO | UFC on FX 5 | 40% |
| 2012-07-11 | Kenny Robertson | Win | U-DEC | UFC on FUEL TV 4 | 35% |
| 2012-02-15 | Ronny Markes | Loss | S-DEC | UFC on FUEL TV 1 | 32% |
| 2011-10-08 | Eric Schafer | Win | U-DEC | UFC 136: Edgar vs Maynard 3 | 66% |
| 2011-07-02 | Brad Tavares | Win | U-DEC | UFC 132: Cruz vs Faber II | 26% |
| 2011-03-26 | Mario Miranda | Win | U-DEC | UFC Fight Night 24 | 39% |
| 2010-11-20 | Mark Muñoz | Loss | U-DEC | UFC 123: Rampage vs. Machida | 35% |
| 2010-06-19 | Chris Leben | Loss | KO/TKO | The Ultimate Fighter 11 Finale | 32% |
| 2010-01-11 | Tom Lawlor | Win | S-DEC | UFC Fight Night 20 |