Sean Pierson (14-6, 10) was born in Toronto, Ontario, Canada on March 10, 1976. At the age of 23 years on October 9, 1999, he made his professional MMA debut against Steve Vigneault, winning the fight via 1st-round TKO.
On December 11, 2010, 34-year old Sean Pierson made his UFC debut on his 15th professional MMA fight at UFC 124 against Matthew Riddle, winning the fight via 3-round unanimous decision.
Pierson's last fight was a 3-round majority decision win against Kenny Robertson at UFC 161 at age 37 on June 15, 2013. He retired with a 3-fight winning streak.
He has fought six times in the UFC, and has a record of 4 wins and 2 losses in the promotion.
Some of Sean Pierson's best fights have been against Matthew Riddle, Jake Hecht, Lance Benoist and Kenny Robertson.
Pierson has 6 losses on his MMA record.
| # | Date | Opponent | Promotion | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|---|
20  | Jun 15, 2013 37 years, 3 months 14-6 (10) | 29 years, 4 months 12-2 (11) | UFC | WL | 3 | MD | WIN |
19  | Sep 22, 2012 36 years, 6 months 13-6 (10) | 24 years 6-1 (5) | UFC | WL | 3 | UD | WIN |
18  | Jun 8, 2012 36 years, 2 months 12-6 (10) | 28 years, 3 months 11-3 (8) | UFC | WL | 3 | UD | WIN |
17  | Dec 30, 2011 35 years, 9 months 11-6 (10) | 30 years, 1 months 14-1-1 (7) | UFC | WL | 3 | UD | LOSS |
16  | Apr 30, 2011 35 years, 1 months 11-5 (10) | 26 years, 1 months 24-5 (20) | UFC | WL | 1 | KO | LOSS Punches |
15 | Dec 11, 2010 34 years, 9 months 11-4 (10) | Matthew Riddle | UFC | WL | 3 | UD | WIN |
14 | Oct 23, 2010 34 years, 7 months 10-4 (10) | Ricky Goodall | WL | 1 | TKO | WIN Punches | |
13 | Dec 12, 2009 33 years, 9 months 9-4 (9) | Fabio Holanda | WL | 1 | KO | WIN Punches | |
12 | Aug 22, 2009 33 years, 5 months 8-4 (8) | Jason Rorison | WL | 1 | TKO | WIN Punches and knees to the body | |
11 | Jun 13, 2009 33 years, 3 months 7-4 (7) | Iraj Hadin | WL | 1 | TKO | WIN Punches | |
10 | Oct 3, 2008 32 years, 6 months 6-4 (6) | Jacob MacDonald | WL | 1 | SUB | WIN Punches | |
9 | Jul 21, 2007 31 years, 4 months 5-4 (5) | Jesse Bongfeldt | WL | 2 | TKO | LOSS Punches | |
8 | Mar 17, 2007 31 years 5-3 (5) | Chester Post | WL | 1 | TKO | WIN Punches | |
7 | Sep 6, 2003 27 years, 5 months 4-3 (4) | Steve Vigneault | WL | 3 | UD | LOSS | |
6 | Jun 15, 2002 26 years, 3 months 4-2 (4) | Mark Colangelo | WL | 1 | SUB | WIN Armbar | |
5  | Jan 25, 2002 25 years, 10 months 3-2 (3) | 22 years, 6 months 8-5 (6) | WL | 2 | KO | LOSS Head kick | |
4 | Jan 27, 2001 24 years, 10 months 3-1 (3) | Ali Nestor Charles | WL | 1 | SUB | WIN Heel hook | |
3 | Jun 14, 2000 24 years, 3 months 2-1 (2) | Chad Saunders | WL | 1 | SUB | LOSS Heel hook | |
2 | Jan 22, 2000 23 years, 10 months 2-0 (2) | Steve Vigneault | WL | 1 | TKO | WIN Punches | |
1 | Oct 9, 1999 23 years, 6 months 1-0 (1) | Steve Vigneault | 1 | TKO | WIN Punches |
