Here is a list of Collazo's best fights. For a list of Collazo's losses, refer to "Luis Collazo Losses".
On January 30, 2014 Luis Collazo faced off against Victor Ortiz in a welterweight bout at age 32. He was coming in with a record of 35-5 (18), and Ortiz was 26 years old and with a record of 29-4-2 (22). Collazo stopped Victor Ortiz via KO.
On August 13, 2005 Luis Collazo met Miguel Ángel González in a welterweight (WBA (Regular)) world-title defense fight. Collazo was 24 years old and with a record of 26-1 (12), and González was 34 years old and with a record of 49-4-1 (39). Collazo stopped Miguel Ángel González via 7th-round retirement and successfully defended his title.
On March 17, 2019 Luis Collazo faced off against Samuel Vargas at age 37. He was coming in with a record of 39-7 (20), and Vargas was 29 years old and with a record of 30-4-2 (14). Collazo won the fight via 10-round split decision.