Square Groove Drama – Phil Mickelson Accused of Cheating!
As most golf fans are aware, on Jan 1, 2010 a new condition of competition went into effect on the
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About the USGA Groove Rule Change
The USGA is finally pulling the trigger on a rule change related to square grooves, or U grooves, or box grooves. One of the biggest misconceptions about this rule change is that the USGA is banning square grooves. This is not the case at all.
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