Here is a list of O'Connell's best fights. For a list of O'Connell's losses, refer to "Sean O'Connell Losses".
On May 10, 2015 Sean O'Connell faced off against Anthony Perosh in a light-heavyweight bout at age 31. He was coming in with a record of 17-6 (12), and Perosh was 42 years old and with a record of 15-8 (15). O'Connell stopped Anthony Perosh via TKO.
On December 31, 2018 Sean O'Connell faced off against Vinny Magalhães in a light-heavyweight bout at age 35. He was coming in with a record of 21-10 (15), and Magalhães was 34 years old and with a record of 18-9 (17). O'Connell stopped Vinny Magalhães via TKO.
On October 13, 2018 Sean O'Connell faced off against Smealinho Rama in a light-heavyweight bout at age 35. He was coming in with a record of 20-10 (14), and Rama was 26 years old and with a record of 11-4-1 (10). O'Connell stopped Smealinho Rama via KO.
On January 18, 2015 Sean O'Connell faced off against Matt Van Buren in a light-heavyweight bout at age 31. He was coming in with a record of 16-6 (11). O'Connell stopped Matt Van Buren via TKO.
On June 21, 2018 Sean O'Connell faced off against Ronny Markes in a light-heavyweight bout at age 34. He was coming in with a record of 18-9 (13), and Markes was 30 years old and with a record of 18-5 (11). O'Connell stopped Ronny Markes via TKO.
On October 13, 2018 Sean O'Connell faced off against Daniel Spohn in a light-heavyweight bout at age 35. He was coming in with a record of 19-10 (13), and Spohn was 34 years old and with a record of 18-5 (12). O'Connell won the fight via 2-round majority decision.
On September 28, 2013 Sean O'Connell faced off against Marvin Eastman in a light-heavyweight bout at age 30. He was coming in with a record of 14-4 (9), and Eastman was 42 years old and with a record of 18-14-1 (8). O'Connell won the fight via 3-round unanimous decision.
On January 17, 2014 Sean O'Connell faced off against Markhaile Wedderburn in a light-heavyweight bout at age 30. He was coming in with a record of 15-4 (10). O'Connell stopped Markhaile Wedderburn via submission.