Carlos Monzón has three losses against three opponents on his boxing record. For a list of Monzón's best fights, refer to "Best fights of Carlos Monzón".
On October 9, 1964 Carlos Monzón faced off against Alberto Massi at age 22. He was coming in with a record of 16-3 (14). Monzón lost the fight via 10-round unanimous decision.
On June 28, 1964 Carlos Monzón faced off against Felipe Cambeiro at age 21. He was coming in with a record of 11-2 (10). Monzón lost the fight via 8-round points decision.
On August 28, 1963 Carlos Monzón faced off against Antonio Aguilar at age 21. He was coming in with a record of 7-1 (7). Monzón lost the fight via 10-round points decision.
