Dave Pelz's Pelzmeter gives Mickelson an advantage

Phil Mickelson has an advantage over all players this week. He's got Dave Pelz, the short game guru, who is measuring the speed of the greens with his $150,000 computerized Pelzmeter. It measures the green speed differently than the traditional roll a ball off the "Stimpmeter," which is what the PGA/USGA use. Only Mickelson gets to know the readings from the Pelzmeter (besides Pelz himself, of course). More here.