Victoriano Sosa has four losses against four opponents on his boxing record. For a list of Sosa's best fights, refer to "Best fights of Victoriano Sosa".
On February 28, 2004 Victoriano Sosa faced off against Miguel Cotto in a super-lightweight bout at age 29. He was coming in with a record of 37-4-2 (27), and Cotto was 23 years old and with a record of 18-0 (15). Sosa lost the fight via 4th-round TKO.
On April 19, 2003 Victoriano Sosa fought Floyd Mayweather Jr. in a lightweight world-title fight for Mayweather Jr.'s WBC title. Sosa was 29 years old and with a record of 35-3-2 (26), and Mayweather Jr. was 26 years old and with a record of 29-0 (20). Sosa lost the fight via 12-round unanimous decision.
On March 3, 2000 Victoriano Sosa fought Paul Spadafora in a lightweight world-title fight for Spadafora's IBF title. Sosa was 25 years old and with a record of 24-2-1 (19), and Spadafora was 24 years old and with a record of 28-0 (14). Sosa lost the fight via 12-round unanimous decision.
On September 23, 1996 Victoriano Sosa faced off against Antonio Ramriez at age 22. He was coming in with a record of 5-1-1 (4). Sosa lost the fight via 2nd-round KO.