This new rule has been implemented as January 1, 2010.  This new rule, for those not familiar, is designed to make hitting out of the rough more difficult for the expert players.  In essence, grooves on new clubs allowed players to hit greens fairly easily from the rough which has lessened the importance of driving accuracy.  Let's breakdown the new grooves rule and what it means to us amateurs.

According to the USGA.org web site: 
1) "The volume of grooves is reduced." 
2) "Groove edge sharpness is reduced for clubs with lofts greater than or equal to 25 degrees."

"A common misconception is that “V” shaped grooves will be required under the new specifications and that “U” shaped grooves will no longer be allowed.  This is not the case.  However, any “U” shaped groove must conform to the new specifications for both cross sectional area/spacing and edge radius."

In amateur golf speak:
1) 5 irons through wedges will be affected. 
2) The groove edges are not as sharp, and the grooves themselves are not as deep, all of which reduces the spin of the golf ball.

What does the change mean to amateurs?  It means basically nothing.  Studies suggest amateurs don't have the skills to take advantage of deeper grooves.  Thus, we won't have to buy new clubs.  We can continue to play our golf clubs in our amateur tournaments or whenever.  This new rule is in place for professional tournaments and qualifying tournaments for pro events.  There is a grace period for some qualifying tournaments but the entire professional golf world will be following the new rules by 2014.

Tees to Greens and All that's Between!