4 guys who all fought one another?

[The Old LefHook]

Tommy Loughran
Harry Greb
Gene Tunney
Chuck Wiggins

No complete record for Wiggins. But he must have been a tough SOB. One of Greb's favorite opponents, according to the nine times he fought him.

[The Old LefHook]

Greb said Wiggins was "The best headbutter I ever butted with." He beat Greb twice and drew with him twice.

[The Old LefHook]

You boys can go on home now.

[GhostofDempsey]

Dempsey, Tunney, Gibbons, Carpentier

Ali, Frazier, Foreman, Chuvalo

[Hustle]

The most famous case is the Fabulous Four. There's also SRL-Duran-Hearns-Benitez.

Bert Cooper, Holyfield, Foreman, Moorer all fought each other in the 90s. Same with Holyfield, Tyson, Holmes and Brian Nielsen.

Any other cases people can think of?

Floyd, pac, Mosley, cotto

Cotto, pac, Margarito, mosley

Hopkins, Dawson, Tarver, Johnson

[The Old LefHook]

Dempsey, Tunney, Gibbons, Carpentier

Ali, Frazier, Foreman, Chuvalo

Good ones!

[The Old LefHook]

Floyd, pac, Mosley, cotto

Cotto, pac, Margarito, mosley

Hopkins, Dawson, Tarver, Johnson

Indeed, lad.