

Loss
KO/TKO (R1 · 4:40)UFC 153: Silva vs Bonnar
UFC round data: 15 bouts · through 2012-10-13

Heuristic scores · 0–100
15 UFC bouts · 50 division peers
Data through 2012-10-13
10 bouts reaching round 3
Data through 2011-11-19
Fight IQ = 40% striking-accuracy percentile + 30% striking-defense percentile + 30% takedown-defense percentile within the division.
Requires 3 UFC bouts, 15 measured minutes, at least 10 division peers, 100 strike attempts, 100 opponent strike attempts and 10 opponent takedown attempts.
Cardio = 100 × the median late/early significant-strike attempt rate ratio, capped at 100. Compare rounds 3+ with rounds 1–2 within each bout. Requires 3 eligible bouts with at least 60 late-round seconds each. 100 means maintained or higher late pace.
Fight IQ summarizes accuracy and defense; cardio summarizes retained pace. Style, opponents and grappling affect both. These scores do not measure intelligence, physical fitness or win probability.
Formula v1
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Stephan Bonnar has a professional MMA record of 15-9-0 (wins-losses-draws).
Stephan Bonnar's UFC record is 8-7-0 (wins-losses-draws), and 7-2-0 in professional fights outside the UFC.
Stephan Bonnar does not have a fight currently scheduled.
Stephan Bonnar is 49 years old, born April 4, 1977.
Stephan Bonnar stands 193 cm (6'4") tall, with a 201 cm (79") reach.
Stephan Bonnar is from United States.
Stephan Bonnar is known as "The American Psycho".
Stephan Bonnar last fought on October 13, 2012 at UFC 153: Silva vs Bonnar, losing to Anderson Silva by KO/TKO in round 1.
Stephan Bonnar defeated Kyle Kingsbury by unanimous decision at UFC 139: Shogun vs Henderson on November 19, 2011. The official scorecards were Steve English 30-27, Ralph McKnight 30-27, Jackie Denkin 30-25 (winner's score first).
Stephan Bonnar defeated Igor Pokrajac by unanimous decision at The Ultimate Fighter: Team GSP vs Team Koscheck Finale on December 4, 2010. All three judges (Illegal Strikes by Each FighterCecil Peoples, Glenn Trowbridge, Tony Weeks) scored the fight 29-26 in Stephan Bonnar's favor.
Stephan Bonnar (United States), a light heavyweight, went 15-9 as a pro and 8-7 in the UFC (7-2 outside it). He debuted at The Ultimate Fighter: Team Couture vs. Team Liddell Finale on April 9, 2005; two of his eight UFC wins came by KO/TKO, two by submission and four by decision. His reach of 79 inches is 2.5 inches longer than the light heavyweight average (76.5 inches). Last fight: KO/TKO loss to Anderson Silva, then 15-0 in the UFC, on October 13, 2012 (UFC 153: Silva vs Bonnar).
Built from AgentMMA's UFC database (as of November 7, 2026); not AI-written.
Computed by AgentMMA from the round-by-round stats of 15 UFC bouts (2:53:23 of fight time).
| Stat | Bonnar | Division average | Percentile |
|---|---|---|---|
| Significant strikes landed per minute | 2.7459 in 2:53:23 | 4 | 20 |
| Significant strike accuracy | 39.7%459 of 1,155 landed | 50.5% | 0 |
| Significant strikes absorbed per minute | 2.9501 in 2:53:23 | 3.7 | 24 |
| Significant strike defense | 52.4%552 of 1,053 avoided | 50.1% | 60 |
| Takedowns per 15 minutes | 1.517 in 2:53:23 | 1.2 | 68 |
| Takedown accuracy | 41.5%17 of 41 landed | 33.9% | 73 |
| Takedown defense | 58.5%31 of 53 stopped | 66.9% | 35 |
| Submission attempts per 15 minutes | 1.113 in 2:53:23 | 0.3 | 92 |
| Knockdowns per 15 minutes | 0.22 in 2:53:23 | 0.5 | 24 |
| Control time | 34.3%59:29 of 2:53:23 | 18.5% | 88 |
| Average fight time | 11:3415 bouts | 9:08 | 84 |
| Height | 193 cm76″ | 189 cm74.5″ | |
| Reach | 201 cm79″ | 194 cm76.5″ |
UFC record: 8-7
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