Authentic Phil Mickelson signed sports memorabilia collectors will love this Phil Mickelson Autographed 2013 British Open Pin Flag Muirfield Champion JSA Authentic Loa from Sports Collectibles. This Phil Mickelson signature comes with a Certificate of Authenticity from JSA. Sports Collectibles is the online leader in 100% authentic Phil Mickelson and autographed collectibles. This particular autograph is in pristine condition and would make for a perfect start to a memorabilia collection. Autographed Phil Mickelson collectibles are hard to find, you are only a few quick clicks away from an authentic Phil Mickelson sports gift.