Antonio DeMarco has nine losses against nine opponents on his boxing record. For a list of DeMarco's best fights, refer to "Best fights of Antonio DeMarco".
On June 16, 2020 Antonio DeMarco faced off against Giovani Santillan at age 34. He was coming in with a record of 33-9-1 (24), and Santillan was 28 years old and with a record of 25-0 (15). DeMarco lost the fight via 10-round majority decision.
On July 13, 2019 Antonio DeMarco faced off against Jamal James at age 33. He was coming in with a record of 33-8-1 (24), and James was 30 years old and with a record of 25-1 (12). DeMarco lost the fight via 10-round unanimous decision.
On October 20, 2018 Antonio DeMarco faced off against Maxim Dadashev in a super-lightweight bout at age 32. He was coming in with a record of 33-7-1 (24). DeMarco lost the fight via 10-round unanimous decision.
On December 12, 2015 Antonio DeMarco faced off against Omar Figueroa Jr. at age 29. He was coming in with a record of 31-6-1 (23), and Figueroa Jr. was 25 years old and with a record of 25-0-1 (18). DeMarco lost the fight via 12-round unanimous decision.
On June 20, 2015 Antonio DeMarco faced off against Rances Barthelemy at age 29. He was coming in with a record of 31-5-1 (23), and Barthelemy was 28 years old and with a record of 22-0 (13). DeMarco lost the fight via 10-round unanimous decision.
On November 22, 2014 Antonio DeMarco fought Jessie Vargas in a super-lightweight world-title fight for Vargas' WBA (Regular) title. DeMarco was 28 years old and with a record of 31-4-1 (23), and Vargas was 25 years old and with a record of 25-0 (9). DeMarco lost the fight via 12-round unanimous decision.
On November 17, 2012 Antonio DeMarco met Adrien Broner in a lightweight (WBC) world-title defense fight. DeMarco was 26 years old and with a record of 28-3-1 (21), and Broner was 23 years old and with a record of 24-0 (20). DeMarco lost the fight via 8th-round TKO and lost the title.
On February 6, 2010 Antonio DeMarco fought Edwin Valero in a lightweight world-title fight for Valero's WBC title. DeMarco was 24 years old and with a record of 23-2-1 (17), and Valero was 28 years old and with a record of 26-0 (26). DeMarco lost the fight via 9th-round retirement.
On February 4, 2006 Antonio DeMarco faced off against Anthony Vasquez at age 20. He was coming in with a record of 8-1 (7). DeMarco lost the fight via 6-round majority decision.
