Derrick Gainer has seven losses against seven opponents on his boxing record. For a list of Gainer's best fights, refer to "Best fights of Derrick Gainer".
On April 22, 2005 Derrick Gainer fought Chris John in a featherweight world-title fight for John's WBA (Regular) title. Gainer was 32 years old and with a record of 39-7-1 (24), and John was 25 years old and with a record of 34-0-1 (19). Gainer lost the fight via 12-round unanimous decision.
On November 1, 2003 Derrick Gainer, the WBA champion, met Juan Manuel Márquez, the IBF champion, in a featherweight world-title unification fight. Gainer was 31 years old and with a record of 39-6-1 (24), and Márquez was 30 years old and with a record of 41-2 (33). Gainer lost the fight via 7-round technical decision and lost his title.
On March 18, 2000 Derrick Gainer fought Diego Corrales in a super-featherweight world-title fight for the IBF title. Gainer was 27 years old and with a record of 33-5 (21), and Corrales was 22 years old and with a record of 30-0 (24). Gainer lost the fight via 3rd-round TKO.
On June 15, 1996 Derrick Gainer faced off against Kevin Kelley in a featherweight bout at age 23. He was coming in with a record of 17-4 (10), and Kelley was 28 years old and with a record of 43-1-2 (30). Gainer lost the fight via 8th-round KO.
On November 18, 1994 Derrick Gainer faced off against Robert Garcia at age 22. He was coming in with a record of 12-3 (6), and Garcia was 19 years old and with a record of 16-0 (13). Gainer lost the fight via 10-round unanimous decision.
On October 5, 1994 Derrick Gainer faced off against Greg Torres at age 22. He was coming in with a record of 12-2 (6). Gainer lost the fight via 10-round unanimous decision.
On November 8, 1990 Derrick Gainer faced off against Scott Phillips at age 18. He was coming in with a record of 2-1 (1). Gainer lost the fight via 6-round split decision.
