A weekly boxing list compiled by Michael Rosenthal. This week: With the Super Six super middleweight tournament in mind, here are 168-pound titleholders with the most successful defenses (not necessarily during a single reign).

1. Joe Calzaghe – 21 (1997-2007)
2. Sven Ottke – 21 (1998-2004)
3. Chris Eubank – 14 (1992-94)
4. Chong-Pal Park – 9 (1985-88)
5. Nigel Benn – 9 (1992-95)
6. Markus Beyer – 7 (1993-96)
7. Frankie Liles – 7 (1994-98)
8. Steve Collins — 7 (1995-97)
9. Mikkel Kessler – 6 (2005-present)
10. Roy Jones – 5 (1995-96)

Michael Rosenthal can be reached at [email protected]