A weekly boxing list compiled by Michael Rosenthal. This week: Boxers who finished their careers undefeated. Floyd Mayweather Jr. is 40-0 going into his fight against Shane Mosley on Saturday in Las Vegas. (In order of number of victories.)
1. Rocky Marciano: 49-0
Ten More: Jemal Hinton 22-0, Ike Ibeabuchi 20-0, Gurcharan Singh 20-0, Kirk Daley 19-0, Jimmy Barry 59-0-10, Ricardo Lopez 51-0-1, Edson Pedro Nascimento 47-0-1, Agustin Senin 42-0-1, Jack McAuliffe 34-0-7, Laszlo Papp 27-0-2.
Note: No one will be surprised if Calzaghe comes out of retirement.