Ryder Cup 2020 Whistling Straits Golf Flag Multi Signed Bryson, Dustin + Harris. Ryder Cup 2020 Whistling Straits official golf flag signed by Dustin Johnson, Bryson DeChambeau and Harris English (see photos). The flag will come with a COA.100% genuine, where possible I will add photo proof to the listing. _gsrx_vers_856 GS 7.0.20 (856). This item is in the category "Sports Memorabilia\Golf Memorabilia\Autographs". The seller is "surreyhillssignings" and is located in this country: GB. This item can be shipped worldwide.