Mark Weir has 18 losses against 18 opponents on his MMA record. For a list of Weir's best fights, refer to "Best fights of Mark Weir".
On June 25, 2011 Mark Weir met Denniston Sutherland in a middleweight (UCMMA Championship) title defense fight. Weir was 43 years old and with a record of 20-18-1 (19). Weir lost the fight via 1st-round KO and lost the title.
On October 31, 2009 Mark Weir faced off against Tor Troéng in a welterweight bout at age 42. He was coming in with a record of 19-17-1 (18), and Troéng was 26 years old and with a record of 8-3-1 (6). Weir lost the fight via 3rd-round submission.
On February 7, 2009 Mark Weir faced off against Mohamed Khacha in a welterweight bout at age 41. He was coming in with a record of 19-16 (18). Weir lost the fight via 1st-round TKO.
On December 1, 2007 Mark Weir faced off against Drew Fickett in a welterweight bout at age 40. He was coming in with a record of 18-15 (17), and Fickett was 27 years old and with a record of 31-5 (23). Weir lost the fight via 1st-round submission.
On September 22, 2007 Mark Weir faced off against Paul Daley in a welterweight bout at age 40. He was coming in with a record of 18-14 (17), and Daley was 24 years old and with a record of 14-6-2 (11). Weir lost the fight via 2nd-round TKO.
On August 24, 2007 Mark Weir faced off against Nick Thompson in a middleweight bout at age 39. He was coming in with a record of 18-13 (17), and Thompson was 26 years old and with a record of 32-9-1 (28). Weir lost the fight via 1st-round TKO.
On December 9, 2006 Mark Weir faced off against Zelg Galešic in a middleweight bout at age 39. He was coming in with a record of 17-12 (17), and Galešic was 27 years old and with a record of 5-1 (5). Weir lost the fight via 1st-round TKO.
On September 30, 2006 Mark Weir faced off against Murilo Rua in a middleweight bout at age 39. He was coming in with a record of 17-11 (17), and Rua was 26 years old and with a record of 11-7-1 (9). Weir lost the fight via 2nd-round submission.
On April 2, 2006 Mark Weir faced off against Denis Kang in a middleweight bout at age 38. He was coming in with a record of 17-10 (17), and Kang was 28 years old and with a record of 23-7-1 (21). Weir lost the fight via 1st-round submission.
On April 30, 2005 Mark Weir faced off against Curtis Stout in a middleweight bout at age 37. He was coming in with a record of 14-9 (14). Weir lost the fight via 1st-round TKO.
On March 17, 2005 Mark Weir met Alex Serdyukov in a middleweight (WEC North American Championship6) title defense fight. Weir was 37 years old and with a record of 14-8 (14), and Serdyukov was 24 years old and with a record of 2-1 (1). Weir lost the fight via 2nd-round submission and lost the title.
On February 26, 2005 Mark Weir faced off against Gabriel Santos in a middleweight bout at age 37. He was coming in with a record of 14-7 (14). Weir lost the fight via 3-round unanimous decision.
On November 27, 2004 Mark Weir faced off against Matt Lindland in a middleweight bout at age 37. He was coming in with a record of 14-6 (14), and Lindland was 34 years old and with a record of 11-3 (6). Weir lost the fight via 1st-round TKO.
On July 10, 2004 Mark Weir faced off against Jorge Rivera at age 36. He was coming in with a record of 12-5 (12), and Rivera was 32 years old and with a record of 8-2 (7). Weir lost the fight via 1st-round TKO.
On November 9, 2003 Mark Weir faced off against Gregory Bouchelaghem at age 36. He was coming in with a record of 10-4 (10). Weir lost the fight via 1st-round submission.
On April 25, 2003 Mark Weir faced off against David Loiseau at age 35. He was coming in with a record of 9-3 (9), and Loiseau was 23 years old and with a record of 8-2 (6). Weir lost the fight via 1st-round KO.
On November 22, 2002 Mark Weir faced off against Phillip Miller at age 35. He was coming in with a record of 9-2 (9), and Miller was 23 years old and with a record of 14-0 (11). Weir lost the fight via 2nd-round submission.
On May 29, 2000 Mark Weir faced off against Trevor Cunningham at age 32. He was coming in with a record of 0-1 (0). Weir lost the fight via 2nd-round KO.
