In 2010, the United States Golf Association banned so-called square grooves -- which are actually U-shaped -- cut into the faces of clubs with lofts greater than or equal to 25 degrees. The USGA’s reasoning was that the increased spin produced by the square grooves greatly reduced the difficulty of certain shots, particularly shots from the rough. As of the date of publication, PGA Tour players seemed to have compensated sufficiently, making the rules change more of a tweak rather than a revolutionary event.
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