A weekly boxing list compiled by Michael Rosenthal. This week: Fighters in THE RING ratings with perfect records (no losses and no draws). They are in order of most victories, with knockouts serving as tie-breakers:

1. Sergei Dzindziruk, jr. middleweight: 36-0 (22 KOs)
2. Oleydong Sithsamerchai, strawweight: 31-0 (12 KOs)
3. Zsolt Erdei, light heavyweight: 30-0 (17 KOs)
4. Arthur Abraham, middleweight: 29-0 (23 KOs)
5. Vyacheslav Senchenko, welterweight: 29-0 (20 KOs)
6. Alexander Dimitrenko, heavyweight: 29-0 (19 KOs)
7. Kevin Mitchell, jr. lightweight: 28-0 (21 KOs)
8. Anthony Peterson, lightweight: 28-0 (19 KOs)
9. Chad Dawson, light heavyweight: 28-0 (17 KOs)
10. Chris Arreola, heavyweight: 27-0 (24 KOs)

The rest: Edwin Valero, lightweight: 25-0 (25 KOs); Andre Berto, welterweight: 25-0 (19 KOs); Jorge Linares, jr. lightweight: 25-0 (16 KOs); Juan Manuel Lopez, jr. featherweight: 24-0 (22 KOs); Carl Froch, super middleweight: 24-0 (20 KOs); James Kirkland, jr. middleweight: 24-0 (21 KOs); Timothy Bradley, jr. welterweight: 24-0 (11 KOs); Lucian Bute, super middleweight: 23-0 (18 KOs); Roman Gonzalez, strawweight: 22-0 (20 KOs); Breidis Prescott, lightweight: 21-0 (18 KOs); Karoly Balzsay, super middleweight: 20-0 (14 KOs); Nkosinathi Joyi, strawweight: 19-0 (15 KOs); Yonnhy Perez, bantamweight: 19-0 (14 KOs); Koki Kameda, flyweight: 19-0 (12 KOs); Andre Ward, super middleweight: 19-0 (12 KOs); Abner Mares, bantamweight: 18-0 (11 KOs); Milan Melindo, strawweight: 18-0 (5 KOs); Alexander Povetkin, heavyweight: 17-0 (12 KOs); Nehomar Cermeno, bantamweight: 16-0 (10 KOs); Yuriorkis Gamboa, featherweight: 15-0 (13 KOs); Simphiwe Nongqayi, jr. bantamweight: 15-0 (6 KOs).

Michael Rosenthal can be reached at [email protected]