7/17/12 Five players in the USGA senior open were using the grooved grip technology on their putter. The following are the results:
Position/Average putts when green hit in regulation/Total Putts
T12th 1.60 28.75
T15th 1.69 30.5
T22nd l.68 30.2
T28th 1.64 29.5
T36th 1.64 29.5
www.prescriptiongolf.com/PutterGrip.aspx