Here is a list of Gainer's best fights. For a list of Gainer's losses, refer to "Derrick Gainer Losses".
On February 24, 2001 Derrick Gainer met Victor Polo in a featherweight (WBA) world-title defense fight. Gainer was 28 years old and with a record of 37-5 (23), and Polo was 28 years old and with a record of 29-2-2 (22). Gainer won the fight via 12-round unanimous decision and successfully defended his title.
On September 9, 2000 Derrick Gainer fought Freddie Norwood in a featherweight world-title fight for Norwood's WBA title. Gainer was 28 years old and with a record of 36-5 (23), and Norwood was 30 years old and with a record of 38-0-1 (22). Gainer stopped Freddie Norwood via 11th-round KO and is crowned the new featherweight world champion.
On July 18, 1998 Derrick Gainer faced off against Kevin Kelley at age 25. He was coming in with a record of 24-4 (16), and Kelley was 31 years old and with a record of 48-2-2 (32). Gainer won the fight via 10-round unanimous decision.
On August 7, 1997 Derrick Gainer faced off against Manuel Medina in a super-featherweight bout at age 24. He was coming in with a record of 21-4 (14), and Medina was 26 years old and with a record of 53-9 (25). Gainer stopped Manuel Medina via KO.
On October 4, 1996 Derrick Gainer faced off against Patrick Simeon in a featherweight bout at age 24. He was coming in with a record of 18-4 (11). Gainer stopped Patrick Simeon via TKO.