How He Hit ThatFebruary 9, 2015

How He Hit That: Jason Day's freewheeling driver

Jason Day's raw talent has always been evident. The athletic Australian has three runner-up finishes in majors and won last year's WGC World Match Play, but his biggest battle has been staying healthy. A thumb injury cost him three months last season, and a lingering back injury ruined his FedEx Cup.

Fully healthy in San Diego, he parred the second hole of a playoff to beat J.B. Holmes, Harris English and Scott Stallings and claim his third PGA Tour title.

Day's game thrives on a mixture of power and accuracy, says Golf Digest Best Young Teacher Shaun Webb. Day averaged 308 yards per drive while hitting 70 percent of his greens in regulation in San Diego. Day isn't huge -- six feet and 165 pounds -- but he uses a free arm swing to produce high, long shots. "More than 20 percent of all your clubhead speed comes from the arms," says Webb, who teaches David Toms and is based at Toms' golf academy in Shreveport, La. "You can't afford to give that speed away by using your arms incorrectly. Jason lets his arms elevate away from his chest at the top of the backswing, which increases his potential energy. He has time and space to produce more speed through the ball."

To add speed to your swing, set up with a mirror to your right and make your backswing. "Instead of thinking about your turn, concentrate on getting your left arm higher, at least to the level of your right shoulder," says Webb. "You'll not only get more speed, but put yourself in position to take a better path down to the ball."

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