A weekly boxing list compiled by Michael Rosenthal. This week: The highest knockout ratios among fighters ranked by THE RING (knockouts divided by total fights).

1. Edwin Valero: 100 percent (24 fights-24 KOs)
2. Marcos Maidana: 92 percent (26-24)
3. Vitali Klitschko: 92 percent (38-35)
4. Juan Manuel Lopez: 92 percent (24-22)
5. Roman Gonzalez: 91 percent (22-20)
6. Breidis Prescott 90 percent (20-18)
7. James Kirkland: 88 percent (24-21)
8. Kelly Pavlik: 86 percent (35-30)
8. Ponce De Leon: 84 percent (37-31)
10. Wladimir Klitschko 84 percent (55-46)

Michael Rosenthal can be reached at [email protected]. If you have ideas for lists, please don't hesitate to let me know.