George Sullivan has eight losses against eight opponents on his MMA record. For a list of Sullivan's best fights, refer to "Best fights of George Sullivan".
On November 17, 2018 George Sullivan faced off against Manny Walo in a welterweight bout at age 37. He was coming in with a record of 17-8 (11). Sullivan lost the fight via 5-round unanimous decision.
On August 25, 2018 George Sullivan faced off against Mickey Gall in a welterweight bout at age 37. He was coming in with a record of 17-7 (11), and Gall was 26 years old and with a record of 4-1 (4). Sullivan lost the fight via 1st-round submission.
On January 27, 2018 George Sullivan faced off against Niko Price in a welterweight bout at age 36. He was coming in with a record of 17-6 (11), and Price was 28 years old and with a record of 10-1 (9). Sullivan lost the fight via 2nd-round submission.
On January 30, 2016 George Sullivan faced off against Alexander Yakovlev in a welterweight bout at age 34. He was coming in with a record of 17-5 (11), and Yakovlev was 31 years old and with a record of 23-7-1 (16). Sullivan lost the fight via 1st-round KO.
On April 18, 2015 George Sullivan faced off against Tim Means in a welterweight bout at age 34. He was coming in with a record of 16-4 (11), and Means was 31 years old and with a record of 23-6-1 (19). Sullivan lost the fight via 3rd-round submission.
On April 8, 2011 George Sullivan fought Elijah Harshbarger in a welterweight title fight for Harshbarger's Ring of Combat Championship title. Sullivan was 30 years old and with a record of 8-3 (6). Sullivan lost the fight via 3-round unanimous decision.
On April 19, 2008 George Sullivan faced off against Nick Calandrino at age 27. He was coming in with a record of 4-2 (3). Sullivan lost the fight via 1st-round submission.
On September 30, 2006 George Sullivan faced off against Marc Stevens at age 25. He was coming in with a record of 2-1 (1). Sullivan lost the fight via 3rd-round submission.
