Countless golf fans who witnessed Miller’s prime say he was the best ball-striker they’ve ever seen, evidenced by a little-known fact that he once shot a 63 at Oakmont during the U.S. Open (yes, that was a joke, we all knew that already).

But in all seriousness, it’s easy to forget how astonishingly good Johnny Miller was. 18 wins and two majors in five years is a haul almost any player would be proud of.

Miller had a slightly weak grip and his stock shot was a fade. That’s why his most important swing thought is to set up to the ball, make a full turn and then focus on returning your left shoulder to the same place it started.

Why is this so important?

“It eliminates the left side of the golf course. No way it can go left,” Miller says.

Not returning your left shoulder “back to where it started” at address can cause all sorts of problems.

“The momentum of the backswing pulls you off the ball, which is ok, as long as you get back,” Miller says. “If I leave the shoulder back in sort of a ‘sway-and-stay,’ as I call it — it’s terrible.”

Swaying-and-staying can lead to tops, thins, chunks and hooks. But by focusing on returning your left shoulder back to where it started, you’ll keep your body turning, you’ll eliminate the left side of the course, and you’ll hit more compressed iron shots.

WATCH THE VIDEO BELOW:

Article originally appeared on: Golf.com