[Yoda]

When pitching, do you allow your lower body to rotate to the right on the backswing (right handed player), even if 60% of your weight is on your left foot, or do you freeze your lower body on the backswing?

300drive,

When Pitching, Swinging or Hitting, the Body should never be "frozen."

Swinging is all about Body Momentum Transfer into the essentially inert Left Arm and Club. You can be very still in a Putt or little Chip and use just the Left Arm to Pull itself through, but by the time you get to the Pitch Shots, you need at least a partial Pivot Motion to help the Left Arm along.

The Hitter uses the Body differently -- the Right Shoulder now acts as a Launching Pad for the drivng Right Arm instead of as a Rotor for the swinging Left Arm -- but some Pivot Motion is still helpful, if not essential.