Romero Duno has five losses against five opponents on his boxing record. For a list of Duno's best fights, refer to "Best fights of Romero Duno".
On August 31, 2024 Romero Duno faced off against Cain Sandoval at age 28. He was coming in with a record of 26-5 (20). Duno lost the fight via 6th-round KO.
On January 31, 2024 Romero Duno faced off against Antonio Moran at age 28. He was coming in with a record of 26-4 (20), and Moran was 30 years old and with a record of 29-6-1 (20). Duno lost the fight via 6th-round KO.
On January 1, 2022 Romero Duno faced off against Frank Martin at age 26. He was coming in with a record of 24-3 (19), and Martin was 26 years old and with a record of 14-0 (10). Duno lost the fight via 4th-round TKO.
On November 2, 2019 Romero Duno faced off against Ryan Garcia in a lightweight bout at age 24. He was coming in with a record of 21-2 (16), and Garcia was 21 years old and with a record of 18-0 (15). Duno lost the fight via 1st-round KO.
On May 6, 2016 Romero Duno faced off against Mikhail Alexeev in a super-featherweight bout at age 20. He was coming in with a record of 9-1 (8). Duno lost the fight via 8-round unanimous decision.