I think it was GC that mentioned this during their WGC-Accenture telecast Saturday and I wanted to pass it along.
Scott Piercy uses a 10-finger grip, also called a baseball grip. (I do too, btw, and have done so for well over 20 years so I know a little bit about it.)
ESPN posted an article about his grip back in mid-2012 so I'll just link you to it. But I would like to say a couple of things about this much-maligned grip.
The author of the ESPN article says "My friends and a few swing instructors on tour told me that I would hit the ball left with the grip." I can tell you from experience that this simply isn't true. Given the fact that most Tour players who have a problem hitting the ball left use Vardon grips, I'd say that if your grip is making you hit the ball left (or right, for that matter) then you're using your hands improperly. Your hands should simply hold the club, not manipulate it. (Except for some trouble shots... and I've found I can manipulate the club better with 10 fingers.)
I like the baseball grip because it's simple and it's a natural way to grip a club. I've heard that an overlapping grip (aka Vardon grip) helps your hands work together better than any other grip... although the most legendary players like Jones, Nicklaus, and Woods all use an interlocking grip and never seem to have a problem. (Interlock grips also put all 10 fingers on the club.) Why should a baseball grip be any less successful?
I do think a baseball grip is the best grip for players with smaller hands. Nicklaus once said that's why he went with the interlock, but I don't know if Jack Grout would have ever recommended the baseball grip because it's not as traditional. Personally, I've used all three grips and find that I control the club better with all ten fingers on the grip. When I interlock my fingers, it sometimes causes me to get my hands out of position -- a problem I never have with a baseball grip.
Finally... when Carl Rabito straightened out my swing, he never even suggested I change it. Since he's coached major winners I guess that means it's not harmful to your game. Wouldn't you agree?
So if your grip feels uncomfortable, you might be better served by a baseball grip. Or if you use a baseball grip now, don't feel like you have to change it just because it's not the most popular grip around. It's a good grip -- just ask Scott Piercy.
The photo came from this nationalpost.com article.