The NBA Champion Golden State Warriors and American Express today announced a multi-year partnership where American Express will be the Official Card of the team, in addition to joining the Warriors Gold Alliance group, a partnership comprised of key sponsors. The Warriors and American Express will work together to deliver excitement and value for Warriors fans, American Express Card Members and merchants. American Express will also leverage their strong relationships with merchants to deliver unique experiences for Warriors fans -- bringing them closer to their favorite team throughout the NBA season.