| 2008-02-02 | UFC 81: Breaking Point | Heavyweight | Antônio Rodrigo Nogueira def. Tim Sylvia title | Submission (guillotine choke) | 3 | 1:28 |
| 2007-10-20 | UFC 77: Hostile Territory | Heavyweight | Tim Sylvia def. Brandon Vera | Decision (unanimous) (29–27, 29–28, 29–28) | 3 | 5:00 |
| 2007-03-03 | UFC 68: The Uprising | Heavyweight | Randy Couture def. Tim Sylvia title | Decision (unanimous) (50–45, 50–45, 50–45) | 5 | 5:00 |
| 2006-11-18 | UFC 65: Bad Intentions | Heavyweight | Tim Sylvia def. Jeff Monson title | Decision (unanimous) (50–45, 49–46, 49–46) | 5 | 5:00 |
| 2006-07-08 | UFC 61: Bitter Rivals | Heavyweight | Tim Sylvia def. Andrei Arlovski title | Decision (unanimous) (48–47, 49–46, 48–47) | 5 | 5:00 |
| 2006-04-15 | UFC 59: Reality Check | Heavyweight | Tim Sylvia def. Andrei Arlovski title | TKO (punches) | 1 | 2:43 |
| 2006-01-16 | UFC Ultimate Fight Night 3 | Heavyweight | Tim Sylvia def. Assuério Silva | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2005-08-20 | UFC 54: Boiling Point | Heavyweight | Tim Sylvia def. Tra Telligman | KO (head kick) | 1 | 4:59 |
| 2005-02-05 | UFC 51: Super Saturday | Heavyweight | Andrei Arlovski def. Tim Sylvia title | Submission (achilles lock) | 1 | 0:47 |
| 2004-06-19 | UFC 48: Payback | Heavyweight | Frank Mir def. Tim Sylvia title | Technical Submission (armbar) | 1 | 0:50 |
| 2003-09-26 | UFC 44: Undisputed | Heavyweight | Tim Sylvia def. Gan McGee title | TKO (punches) | 1 | 1:54 |
| 2003-02-28 | UFC 41: Onslaught | Heavyweight | Tim Sylvia def. Ricco Rodriguez title | TKO (punches) | 1 | 3:09 |
| 2002-09-27 | UFC 39: The Warriors Return | Heavyweight | Tim Sylvia def. Wesley Correira | TKO (corner stoppage) | 2 | 1:43 |