UFC 86: Jackson vs. Griffin was held by the Ultimate Fighting Championship (UFC) on July 5, 2008, at the Mandalay Bay Events Center in Las Vegas, Nevada.
The title bout between Quinton “Rampage” Jackson and Forrest Griffin was for Jackson’s UFC light heavyweight championship.
A heavyweight bout between Frank Mir and Justin McCully was cancelled due to Mir’s signing on as a coach for the upcoming The Ultimate Fighter: Team Nogueira vs. Team Mir, which will set up a match between Mir and UFC Interim Heavyweight Champion Antonio Rodrigo Nogueira. Both the Chris Wilson vs. Steve Bruno and Ben Saunders vs. Jared Rollins bout were rescheduled for UFC 87.
| Match | Winner | Loser | Method | Round | Time |
| 1 | Justin Buchholz | Corey Hill | Submission (Rear-Naked Choke) | 2 | 3:57 |
| 2 | Melvin Guillard | Dennis Siver | TKO (Punches) | 1 | 0:36 |
| 3 | Cole Miller | Jorge Gurgel | Submission (Triangle Choke) | 3 | 4:48 |
| 4 | Gabriel Gonzaga | Justin McCully | Submission (Kimura) | 1 | 1:57 |
| 5 | Tyson Griffin | Marcus Aurelio | Decision (Unanimous) | 3 | 5:00 |
| 6 | Josh Koscheck | Chris Lytle | Decision (Unanimous) | 3 | 5:00 |
| 7 | Joe Stevenson | Gleison Tibau | Submission (Guillotine choke) | 2 | 2:57 |
| 8 | Patrick Cote | Ricardo Almeida | Decision (Split) | 3 | 5:00 |
| 9 | Forrest Griffin | Quinton Jackson | Decision (Unanimous) | 5 | 5:00 |
Fighter payroll
Forrest Griffin ($250,000/$100,000 for show and $150,000 win bonus) def. Quinton Jackson ($225,000)
Patrick Côté ($32,000/$16,000 for show and $16,000 win bonus) def. Ricardo Almeida ($23,000)
Joe Stevenson ($60,000/$30,000 for show and $30,000 win bonus) def. Gleison Tibau ($11,000)
Josh Koscheck ($70,000/$35,000 for show and $35,000 win bonus) def. Chris Lytle ($14,000)
Tyson Griffin ($40,000/$20,000 for show and $20,000 win bonus) def. Marcus Aurelio ($40,000)
Gabriel Gonzaga ($100,000/$50,000 for show and $50,000 win bonus) def. Justin McCully ($5,000)
Justin Buchholz ($8,000/$4,000 for show and $4,000 win bonus) def. Corey Hill ($8,000)
Melvin Guillard ($20,000/$10,000 for show and $10,000 win bonus) def. Dennis Siver ($7,000)
Cole Miller ($20,000/$10,000 for show and $10,000 win bonus) def. Jorge Gurgel ($10,000)
This does not include bonuses award money.
Total: $943,000