It sounds like the start of a great joke: A minor-league sports executive, one of the richest men in the world, a stand-up comedian, and a Hollywood movie producer conspire to start a soccer team. But what Adrian Hanauer, Paul Allen, Drew Carey, and Joe Roth did when they started the Seattle Sounders FC was no joke. They meticulously planned the launch of the Major League Soccer (MLS) franchise with an eye toward some lofty goals. Then they stood back in amazement as they rocketed far beyond those goals buoyed by a team that ignored its "expansion" label and a fan base that wildly embraced...