The app also assigns grades for several parts of the swing. Rahm’s grade for posture—the app calls it “body lift”—was a 10 out of 10. We picked the right player.

Explore Jon Rahm's driver swing in this detailed breakdown. Known for his powerful and controlled ball flight, Rahm’s swing features a compact backswing, strong leg drive, and a distinctive ...

In the image below, note the dotted line on Rahm’s upper body. That line represents where his spine was at address. At the top of the swing, you can see it’s running right through the middle ...