The purpose of practice is to establish a pattern. Tour players have patterns. Kenny Perry and Tom Lehman draw the ball, so their shots start out to the right of the target.

Zack Johnson got a chuckle and a few gasps Friday at the Masters when his practice swing on No. 13 accidentally clipped his ball off his tee and sent it bouncing off the tee marker.

Of the players, 25 typically used a mid-tee height and two preferred a high tee height. The tee heights —Low: The top edge of the ball was even with the top edge of the driver, so the entire ...