The wedge can be a great strokesaver. Hit a good shot from, say, 50 yards out, and you're down in one putt. Scuff it into a trap instead, and who knows how long it may take you to hole out? I'm sorry to admit that sloppy and inconsistent wedge play has too often been the downfall of my own game. Hitting a wedge is such a delicate shot that there is a natural tendency on the part of most golfers—on mine, too—to relax the left arm, so that it collapses at the start of the downswing. When you do this you have no control over how far you will hit the ball. With few exceptions, wedge shots must be played firmly—not softly. The left arm must remain straight throughout the entire swing, just as in any other shot. Remember this and you'll lower your score a few strokes per round.
On a sloppy wedge the left elbow has collapsed coming into the ball, and the wrists have broken too soon.
Wedge shot should be hit crisply, the left elbow straight, the wrists cocked until the moment of impact.