This official pin flag from the 2010 Ryder Cup at Celtic Manor is autographed by the entire American Team with the exception of Tiger Woods.
Here is a complete list of autographs:
Corey Pavin (Captain)
Phil Mickelson
Dustin Johnson
Zach Johnson
Matt Kuchar
Steve Stricker
Bubba Watson
Hunter Mahan
Jim Furyk
Jeff Overton
Stewart Cink
Rickie Fowler