Jack Brubaker has five losses against five opponents on his boxing record. For a list of Brubaker's best fights, refer to "Best fights of Jack Brubaker".
On August 23, 2023 Jack Brubaker faced off against Nikita Tszyu in a super-welterweight bout at age 31. He was coming in with a record of 17-5-2 (8), and Tszyu was 28 years old and with a record of 6-0 (5). Brubaker lost the fight via 6th-round TKO.
On April 21, 2021 Jack Brubaker faced off against Steve Spark at age 29. He was coming in with a record of 16-4-2 (8), and Spark was 24 years old and with a record of 11-1 (11). Brubaker lost the fight via 8-round unanimous decision.
On December 6, 2019 Jack Brubaker faced off against Tim Tszyu in a super-welterweight bout at age 28. He was coming in with a record of 16-3-2 (8), and Tszyu was 25 years old and with a record of 14-0 (10). Brubaker lost the fight via 4th-round TKO.
On October 22, 2017 Jack Brubaker faced off against Kris George in a welterweight bout at age 25. He was coming in with a record of 13-2-1 (7). Brubaker lost the fight via 6th-round TKO.
On September 12, 2013 Jack Brubaker faced off against Qamil Balla in a super-lightweight bout at age 21. He was coming in with a record of 5-1-1 (2), and Balla was 24 years old and with a record of 5-0-1 (3). Brubaker lost the fight via 10-round unanimous decision.
