Boxers who competed in three or more weight classes?

Harry Greb---147, 160, 175

James Toney---160, 168, 175, 200, + 200

Bernard Hopkins 160, 168, 175

Pernell Whitaker---130, 135, 140, 147, 154

Floyd Mayweather, Jr. 130, 135, 140, 147, 154

Meldrick Taylor---126, 130, 135, 140, 147

Roberto Duran 126, 135, 147, 154, 160, 168

Thomas Hearns 147, 154, 160, 168, 175, 200

Oscar de la Hoya--130, 135, 140, 147, 154, 160

Hector Macho Camacho---130, 135, 140, 147, 154, 160, 168

Tony Canzoneri--126, 130, 135, 140

Barney Ross---126, 135, 147

Jim Mclarnin----118, 126, 135, 147

Wilfredo Benitez---140, 147, 154

Wilfredo Gomez---122, 126, 130

Ruben Olivares----118, 126, 130

Nonito Donaire----112, 115, 118, 122

Fernando Montiel----105, 109, 112, 118, 122

Vic Darchinyan---112, 115, 118, 122

Jeff Fenech---118, 122, 126, 130

Azumah Nelson----126, 130, 135

Juan Manuel Marquez---126, 130, 135, 140, 147

Erik Morales---122, 126, 130, 135, 140, 147

Luisito Espinosa 118, 122, 126, 130

Prince Naseem Hamed 118, 122, 126

Flash Elorde 118, 126, 130, 135

Fighting Harada 112, 118, 126

Ceferino Garcia 135, 147, 160

Charley Burley 147, 160, 175

Mickey Walker 147, 160, 175, +175

Julio Cesar Chavez Sr 130, 135, 140

Shane Mosley 135, 147, 154

Uh, okay Sugar Ray Leonard 147, 154, 160, 168, 175

Sugar Ray Robinson 147, 160, 175 ( just one fight at 175 though, a losing world title try vs. Joey Maxim )

two big ones was missed

Sugar ray robinson

Sugar ray leonard

Well I doubt anyone will top tedor's list though there's still a couple he left out, still impressive tedor..