What 4 fighters have fought each other in every possible combination?

[BoxingGenius27]

Holyfield
Tyson
Buster Douglass
Savareese

[Big_L]

trinidad
vargas
de la hoya
campas

[El Chicano]

You can also replace Rivera with Mayorga.

Margarito, Martinez, Williams, and Cintron too. And obviously Duran, SRL, Hagler, and Hearn.

You're right, I forgot all about Mayorga... lol, he beat Vargas

[BoxingGenius27]

Jones Jr
Calzaghe
Lacy
Sheika

[BoxingGenius27]

Jones Jr
Griffin
Toney
Johnson

[BoxingGenius27]

Jones Jr
Harding
Johnson
Tarver

[El Chicano]

DLH
Trinidad
Carr
Campas

[BoxingGenius27]

Mayorga
Mosley
Vargas
DLH

[El Chicano]

This is hard, there is always one potentially great fight that never got made...

DLH, Trinidad, Vargas, Shane
DLH, Trinidad, Vargas, Quartey
Mayweather, Shane, DLH, Cotto
Mayweather, Cotto, Mosley, Margarito
Erik, MAB, Pacquiao, JMM

[-MAKAVELLI-]

This is hard, there is always one potentially great fight that never got made...

DLH, Trinidad, Vargas, Shane
DLH, Trinidad, Vargas, Quartey
Mayweather, Shane, DLH, Cotto
Mayweather, Cotto, Mosley, Margarito
Erik, MAB, Pacquiao, JMM

Tito-Shane would have been a real fun scrap