This is the clever mental trick Phil Mickelson uses to keep his mind sharp

phil mickelson smiles

Phil Mickelson leads the PGA Championship after a second-round 69.

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Zephyr Melton

Zephyr Melton is an assistant editor for GOLF.com where he spends his days blogging, producing and editing. Prior to joining the team at GOLF, he attended the University of Texas followed by stops with the Texas Golf Association, Team USA, the Green Bay Packers and the PGA Tour. He assists on all things instruction and covers amateur and women’s golf. He can be reached at zephyr_melton@golf.com.