SAW-GRIP PROMISE: A PURE ROLL
Letting your right wrist break down during the putting stroke can alter the position of the putterface at impact. It also can add loft to the face. What you end up with is a putt that hops, skids and misses, usually left of the hole. Distance control can be an issue, too, because an active right hand adds more hit on the ball--and not in a predictable way.
To immobilize your right wrist, try the saw grip, which has become popular in recent years. Grip the club normally with your left hand, but with your right hand, extend your fingers and slot the handle between your thumb and forefinger (left). This position of the right hand helps keep the wrist stable from start to finish.