Pat,
I just found these photos of Locke a few minutes ago:
.... and also this sequence, from start of swing through finish:
His elbows appear to be pointed out, slightly, but nothing like Diegel.
It also shows his wrist action was as Jim Nugent suspected, minimal, but here's his own explanation of his putting stroke:
"I have always thought of the ideal putter swing as matching that of a clock's pendulum, slow and very smooth, with the clubhead going through the same distance it goes back. Thus, in returning the putter to the ball, I try to swing it very smoothly at the same pace I swung it back. Again, there is no wrist action. The putter is swung by my hands, wrists and arms as a unit; my left wrist at impact has exactly the same relationship to my left arm that it had at address. This ensures that the putterblade remains square to my target through impact and well into the follow-through."Peter Alliss said he observed Locke's shoulders moved "a little from right to left as he came into the ball. The stroke itself was rather a jabbing one, with little or no follow-through."
Sam Snead said:"What discouraged me was the way "Old Droopy Jowls" held his putter at the very tip and with his left hand far over the shaft, which was the same grip he used on all shots. ... He had a closed stance and hooked his putts. His grip was so light I thought he'd drop the stick. And when he putted, instead of keeping still, he swayed like a Bloomer girl!"
Peter,
Bob suggested that his weight caused him some problems at Augusta, tiring him out. That's very possible, look at Perry.
I have to think that someone who had such a pronounced hook would have trouble holding those second shots in the best spots.