Here is a list of Tanajara Jr.'s best fights. For a list of Tanajara Jr.'s losses, refer to "Hector Tanajara Jr. Losses".
On June 23, 2018 Hector Tanajara Jr. faced off against Roger Gutierrez at age 21. He was coming in with a record of 14-0 (5), and Gutierrez was 23 years old and with a record of 19-1-1 (16). Tanajara Jr. won the fight via 8-round unanimous decision.