Here is a list of Mezger's best fights. For a list of Mezger's losses, refer to "Guy Mezger Losses".
On May 30, 1997 Guy Mezger fought Tito Ortiz in a lightweight title fight for Ortiz' UFC 13 Tournament title. Mezger was 29 years old and with a record of 13-4-2 (7), and Ortiz was 22 years old and with a record of 1-0 (1). Mezger stopped Tito Ortiz via 1st-round submission and is crowned the new UFC lightweight champion.
On September 14, 1998 Guy Mezger met Ryushi Yanagisawa in a lightweight (Pancrase Openweight Championship) title defense fight. Mezger was 30 years old and with a record of 21-6-2 (10), and Yanagisawa was 26 years old and with a record of 21-12-5 (16). Mezger won the fight via 1-round unanimous decision and successfully defended his title.
On December 19, 1998 Guy Mezger met Yuki Kondo in a lightweight (Pancrase Openweight Championship) title defense fight. Mezger was 30 years old and with a record of 22-6-2 (10), and Kondo was 23 years old and with a record of 20-5-3 (10). Mezger won the fight via 1-round majority decision and successfully defended his title.
On April 26, 1998 Guy Mezger fought Masakatsu Funaki in a lightweight title fight for Funaki's Pancrase Openweight Championship title. Mezger was 30 years old and with a record of 20-5-2 (10), and Funaki was 29 years old and with a record of 35-7 (32). Mezger won the fight via 1-round unanimous decision and is crowned the new Pancrase lightweight champion.
On May 16, 1996 Guy Mezger faced off against Minoru Suzuki at age 28. He was coming in with a record of 8-2-1 (6), and Suzuki was 27 years old and with a record of 19-7 (18). Mezger stopped Minoru Suzuki via KO.
On May 30, 1997 Guy Mezger faced off against Christophe Leininger in a lightweight bout at age 29. He was coming in with a record of 12-4-2 (6), and Leininger was 37 years old and with a record of 3-1 (3). Mezger won the fight via 1-round unanimous decision.
On January 17, 1997 Guy Mezger faced off against Semmy Schilt at age 29. He was coming in with a record of 11-3-2 (6), and Schilt was 23 years old and with a record of 2-2 (1). Mezger won the fight via 1-round unanimous decision.
On June 30, 1997 Guy Mezger faced off against Keiichiro Yamamiya in a lightweight bout at age 29. He was coming in with a record of 14-4-2 (7), and Yamamiya was 24 years old and with a record of 5-6-1 (1). Mezger won the fight via 1-round unanimous decision.
On May 1, 2000 Guy Mezger faced off against Masaaki Satake in a lightweight bout at age 32. He was coming in with a record of 24-9-2 (11), and Satake was 34 years old and with a record of 0-1 (0). Mezger won the fight via 1-round unanimous decision.
On October 29, 1997 Guy Mezger faced off against Kiuma Kunioku in a lightweight bout at age 29. He was coming in with a record of 16-5-2 (9), and Kunioku was 20 years old and with a record of 9-6-3 (5). Mezger stopped Kiuma Kunioku via KO.
