The per round average of the number of Strokes the player was better or worse than the field average on the same course & event minus the Players Strokes Gained putting value. The Strokes Gained - concept is a by-product of the PGA TOUR's ShotLink Intelligence Program, which encourages academics to perform research against ShotLink statistical data. Professor Mark Broadie from Columbia Business School developed the early concept which was later refined by the TOUR (2674)
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