Signatures include: Stephen Ames, Aaron Baddeley, Ricky Barnes , Michael Campbell, Paul Casey , Alex Cejka , Ben Curtis , David Frost , Jim Furyk, Padraig Harrington , Trevor Immelman, Miguel Angel Jimenez, Dustin Johnson , Zach Johnson, Robert Karlsson, Jerry Kelly, Rory McIlroy , Eduardo Molinari , Ryan Moore , Kevin Na , Ian Poulter , John Rollins , Rory Sabbatini, Charl Schwartzel , Adam Scott , David Toms, Scott Verplank , Nick Watney, Mike Weir. Every golf signature was obtained during the practice rounds of the 2010 US Open at Pebble Beach and witnessed by a member of the Palm Beach Autographs staff. This item was hand signed by the athletes and is accompanied by a Certificate of Authenticity from Palm Beach Autographs. A tamper-evident hologram will be affixed to the item. Signed items are guaranteed to pass any third-party authentication with 100% Money Back Guarantee.