Jack Cullen has six losses against six opponents on his boxing record. For a list of Cullen's best fights, refer to "Best fights of Jack Cullen".
On April 6, 2024 Jack Cullen faced off against Luka Plantic in a super-middleweight bout at age 30. He was coming in with a record of 22-6-1 (10). Cullen lost the fight via 5th-round TKO.
On January 20, 2024 Jack Cullen faced off against Zak Chelli in a super-middleweight bout at age 30. He was coming in with a record of 22-5-1 (10). Cullen lost the fight via 12-round unanimous decision.
On March 11, 2023 Jack Cullen faced off against Diego Pacheco in a super-middleweight bout at age 29. He was coming in with a record of 21-4-1 (9), and Pacheco was 22 years old and with a record of 17-0 (14). Cullen lost the fight via 4th-round TKO.
On December 18, 2021 Jack Cullen faced off against Kevin Sadjo in a super-middleweight bout at age 28. He was coming in with a record of 20-3-1 (9). Cullen lost the fight via 6th-round TKO.
On November 2, 2019 Jack Cullen faced off against Felix Cash in a middleweight bout at age 25. He was coming in with a record of 17-2 (8), and Cash was 26 years old and with a record of 11-0 (7). Cullen lost the fight via 8th-round TKO.
On March 3, 2018 Jack Cullen faced off against Roy Sheahan at age 24. He was coming in with a record of 9-1 (3). Cullen lost the fight via 1st-round TKO.