Offered here is an official flag from the 2014 Ryder Cup at Gleneagles that is autographed by the entire United States Team, including Captain Tom Watson, his 3 Vice Captains, and all 12 American players. Very clean, impressive autographs. 

Here is a complete list of autographs on this flag:

Tom Watson (United States Team Captain)
Ray Floyd (Vice Captain)
Andy North (Vice Captain)
Steve Stricker (Vice Captain)
Phil Mickelson
Rickie Fowler
Matt Kuchar
Zach Johnson
Jim Furyk
Bubba Watson
Jordan Spieth
Hunter Mahan
Webb Simpson
Jimmy Walker
Keegan Bradley
Patrick Reed

Letter of Authenticity from James Spence Authentication (JSA)