On August 23, 2023, a 31-year-old Jack Brubaker (17-4-2, 8 KOs) and a 28-year-old fellow Australian boxer Nikita Tszyu (6-0, 5 KOs) met in the ring in a super-welterweight bout.
Brubaker came in to the fight on a 1-fight win streak with a 34% KO rate, and was fighting after a gap of 1 month and 4 days. Tszyu was on a 6-fight win streak with a 83% KO rate, and fighting after a layoff of 2 months and 30 days.
Nikita Tszyu stopped Jack Brubaker via TKO in the 6th round. Tszyu improves his record to 7-0 (6 KOs), while Brubaker adds a loss to his record at 17-5-2.
On April 21, 2021, a 29-year-old Jack Brubaker (16-3-2, 8 KOs) and a 24-year-old fellow Australian boxer Steve Spark (11-1, 11 KOs) met in the ring.
Brubaker came in to the fight on a 1-fight losing streak with a 38% KO rate, and was fighting after a gap of 1 year, 4 months, and 15 days. Spark was on a 10-fight win streak with a 91% KO rate, and fighting after a layoff of 5 months and 7 days.
Steve Spark defeated Jack Brubaker via unanimous decision in the 8-round fight. Spark improves his record to 12-1, while Brubaker adds a loss to his record at 16-4-2.
On December 6, 2019, a 28-year-old Jack Brubaker (16-2-2, 8 KOs) and a 25-year-old fellow Australian boxer Tim Tszyu (14-0, 10 KOs) met in the ring in a super-welterweight bout.
Brubaker came in to the fight on a 1-fight win streak with a 40% KO rate, and was fighting after a gap of 3 months and 22 days. Tszyu was on a 14-fight win streak with a 71% KO rate, and fighting after a layoff of 3 months and 22 days.
Tim Tszyu stopped Jack Brubaker via TKO in the 4th round. Tszyu improves his record to 15-0 (11 KOs), while Brubaker adds a loss to his record at 16-3-2.
On October 22, 2017, a 25-year-old Jack Brubaker (13-1-1, 7 KOs) and Kris George met in the ring in a welterweight bout.
Brubaker came in to the fight on a 8-fight win streak with a 46% KO rate, and was fighting after a gap of 6 months and 14 days.
Jack Brubaker lost to Kris George via TKO in the 6th round, and adds an loss to his record at 13-2-1.
On September 12, 2013, a 21-year-old Jack Brubaker (5-0-1, 2 KOs) and a 24-year-old fellow Australian boxer Qamil Balla (5-0-1, 3 KOs) met in the ring in a super-lightweight bout.
Brubaker came in to the fight on a 1-fight win streak with a 33% KO rate, and was fighting after a gap of 4 months and 2 days. Balla was on a 5-fight win streak with a 50% KO rate, and fighting after a layoff of 1 month and 18 days.
Qamil Balla defeated Jack Brubaker via unanimous decision in the 10-round super-lightweight fight. Balla improves his record to 6-0-1, while Brubaker adds a loss to his record at 5-1-1.