Pat O'Brien was the closest to the pin on the 13th .
Pat O'Brien won a Jordan Spieth signed Chambers Bay pin flag from the 2015 U.S. Open , courtesy of Full Swing Golf .
Pat O'Brien was the closest to the pin on the 13th and won a Jordan Spieth signed Chambers Bay pin flag from the 2015 U.S. Open , courtesy of Full Swing Golf .