Walker has won 3 times already in the Tour’s wraparound season, which is scary considering that his swing has a lot of room to improve. He is a tall, lanky guy with a big arc and he hits the ball a mile, averaging over 300 yards off the tee, but at the same time he is one of the least accurate drivers on Tour, hitting less than 50 % of his fairways. He makes up for this fact by hitting over 70 % of his greens (which means that his misses off the tee are not particularly wild) and by being a fantastic putter (one of the best on the Tour).
As far as swing mechanics go Walker has quite a bit of right load in his backswing, moving almost a full head off the ball with the driver and over half with the irons, and he likes to pinch his upper right arm inward almost from the start. The arm looks for depth at the top and thus raises up and pulls behind him quite a bit, giving him a fairly upright progression with his hands almost fully behind his head at the top. The right arm then drives elbow first to get back in front of him, but this action seems to cause him to back up and push his legs up underneath him. The hands then come into impact very high, but combine a wide approach with a dragging left wrist to produce a good strike even with limited forward shaft lean, much like we saw with John Cook. His rhythm is gorgeous and certainly aids in his ability to time the whole thing, but whether or not that timing sticks around or produces enough accuracy to contend in the majors will be interesting to watch. You can’t argue with success, though, so whether or not he should work on any of this stuff makes for interesting conversation.