San Antonio Spurs Hall of Famer Tim Duncan may be retired, but his career is still the topic of debate. They just ranked Duncan as the second-greatest defensive player in NBA history. The fact that he never won Defensive Player of the Year despite having blocked more than 3,000 shots and having grabbed more than 11,000 defensive rebounds is dumbfounding. Yes, he made an NBA record 15 All-Defensive First Teams but never won Defensive Player of the Year. Truth be told, he should have won at least three or four Defensive Player of the Year awards during his Hall of Fame career.