Putting with Eric Alpenfels and Dr. Bob Christina

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June 24, 2010. Pinehurst, North Carolina..Eric Alpenfels, a golf coach at Pinehurst, and Dr. Bob Christina, a former dean at UNC-Greensboro, have developed a theory that putting is more successful when the player looks at the hole rather than the ball while hitting their shot.. Eric Alpenfels, left, and Bob Christina on the practice green of the Pinehurst Golf Resort..