Luke Winn's Top 16 Impact Defenders

The Jayhawks couldn't have reached the national title game without Withey, the shot-swatting key to their elite defense. He blocked a higher percentage of opponents' attempts (15.3) than Anthony Davis did (13.8) last season, while also rebounding at a high level. As important as Craft is to Ohio State's D, there's nothing more valuable than a dominant shot-changer in the paint -- and there's no better one than Withey.