Swinging harder rarely helps your ball go farther, unless you're trying to hit it farther out of bounds.
Peter Kostis analyzed John Daly's swing on the practice range Saturday between the second and third rounds of the FedEx St. Jude Classic during the CBS broadcast, and you might be surprised to learn how balanced it really is, despite Daly's imposing frame.
As Kostis notes, Daly's power is generated from the large arc of his swing, so he doesn't have to speed up the club to create additional clubspeed. All he's trying to do is make clean contact.
That's a great observation, as most amateurs think if they swing harder, they can generate more clubhead speed. That may be true, but it also creates additional issues with timing and getting the club square at impact. PGA professionals will agree: What good is extra distance if you can't control it?