He used his hips and legs to drive through the ball , turning his shoulders and flexing his knees during the downswing .
Nelson 's swing changed the game shortly after the game had changed from hickory - shafted clubs to less flexible steel shafts .
Nelson used Nelson 's hips and legs to drive through the ball , turning his shoulders and flexing his knees during the downswing .
Nelson 's swing changed the game shortly after the game had changed from hickory - shafted clubs to less flexible steel shafts .