Here is a list of Pettis's best fights. For a list of Pettis's losses, refer to "Sergio Pettis Losses".
On May 7, 2021 Sergio Pettis fought Juan Archuleta in a bantamweight title fight for Archuleta's Bellator World Championship title. Pettis was 27 years old and with a record of 21-5 (6), and Archuleta was 33 years old and with a record of 25-2 (12). Pettis won the fight via 5-round unanimous decision and is crowned the new Bellator bantamweight champion.
On December 3, 2021 Sergio Pettis met Kyoji Horiguchi in a bantamweight (Bellator World Championship) title defense fight. Pettis was 28 years old and with a record of 22-5 (7), and Horiguchi was 31 years old and with a record of 29-3 (18). Pettis stopped Kyoji Horiguchi via 4th-round KO and successfully defended his title.
On January 15, 2017 Sergio Pettis faced off against John Moraga in a flyweight bout at age 23. He was coming in with a record of 15-2 (6). Pettis won the fight via 3-round unanimous decision.
On June 7, 2014 Sergio Pettis faced off against Yaotzin Meza in a bantamweight bout at age 20. He was coming in with a record of 11-1 (6), and Meza was 33 years old and with a record of 20-8 (12). Pettis won the fight via 3-round unanimous decision.
On November 16, 2013 Sergio Pettis faced off against Will Campuzano in a bantamweight bout at age 20. He was coming in with a record of 10-0 (6), and Campuzano was 27 years old and with a record of 13-4 (9). Pettis won the fight via 3-round unanimous decision.
On December 6, 2014 Sergio Pettis faced off against Matt Hobar in a bantamweight bout at age 21. He was coming in with a record of 12-1 (6). Pettis won the fight via 3-round unanimous decision.
On June 9, 2018 Sergio Pettis faced off against Joseph Benavidez in a flyweight bout at age 24. He was coming in with a record of 17-3 (6), and Benavidez was 33 years old and with a record of 25-4 (15). Pettis won the fight via 3-round split decision.
On June 16, 2023 Sergio Pettis met Patrício Pitbull in a bantamweight (Bellator World Championship) title defense fight. Pettis was 29 years old and with a record of 23-5 (7), and Pitbull was 35 years old and with a record of 35-5 (22). Pettis won the fight via 5-round unanimous decision and successfully defended his title.
On April 23, 2016 Sergio Pettis faced off against Chris Kelades in a flyweight bout at age 22. He was coming in with a record of 14-2 (6), and Kelades was 35 years old and with a record of 9-2 (5). Pettis won the fight via 3-round unanimous decision.
On October 3, 2015 Sergio Pettis faced off against Chris Cariaso in a flyweight bout at age 22. He was coming in with a record of 13-2 (6), and Cariaso was 34 years old and with a record of 17-7 (5). Pettis won the fight via 3-round unanimous decision.
