Simple question really. The Eugene Hart thread got me thinking about just how many hard punchers Hagler fought in his career. The man battled Hart, Briscoe, Mugabi, Antoufermo, Hearns, Caveman Lee etc. Is there anyone out there who fought as many lethal punchers as Hagler? Joey Maxim battled Curtis Shepherd, Archie Moore, Bob Murphy, and Ezzard Charles.
Julio Cesar Chavez mixed it up with Rocky Lockridge, Juan Laporte, Edwin Rosario, Kostya Tzsyu, and De La Hoya among others.
Ali fought Shavers, Lyle, Liston, Foreman, Frazier. Holyfield fought Tyson, Bowe, Lewis, Foreman, Cooper, Moorer, Mercer (?) Lewis had Ruddock, Bruno, Tua, Tyson, Morrison, Mercer, Vitali, Golota, Briggs Bowe had Herbie Hide
I suppose Ali would (should) quickly spring to mind Even early in his career Clark Banks, Powell, Cooper, amongst others may be said to qualify but From original title winning .... Liston, Cooper, Williams, Quarry, Bonavena, Frazier, Foster (Mac), Lewis, Foreman, Lyle, Shavers, - And some even got a second chance.
Realistically it's going to be someone like Archie Moore who fought everyone from Patterson and Marciano to Satterfield and Sheppard. Or someone else with 200+ fights.
Archie Moore Curtis Shephard Lloyd Marshall Floyd Patterson Rocky Marciano Nino Valdes Curtis Shephard Billy Smith Ezzard Charles Charley Burley Bob Turner
Sanderline Williams - Gerald McClellan, Don Lee, Nigel Benn, Lindell Holmes, Iran Barkley, Merqui Sosa.
For a modern non-heavyweight answer long after the days of 200-300 fight careers, how about Jose Luis Ramirez? Ruben Olivares, Alexis Arguello, Ray Mancini, Edwin Rosario (twice), prime Julio Cesar Chavez.