Why would a Japanese millionaire want to buy the Seattle Mariners baseball team, when he has admitted that he has never played in or even seen a baseball game? Cash is the answer: major league baseball, like professional football, basketball, and hockey, is now big business with the potential to bring millions of dollars in profits to owners. Not very long ago, however, buying a sports franchise was a hazardous investment risked only by die-hard fans wealthy enough to lose parts of fortunes made in other businesses. What forces have changed team ownership from sports-fan folly to...

What can possibly account for the strange state of affairs in professional sports today? There are billionaire owners and millionaire players, but both groups are constantly squabbling over money. Many pro teams appear to be virtual "cash machines," generating astronomical annual revenues, but their owners seem willing to uproot them and move to any city willing to promise increased profits. At the same time, mayors continue to cook up "sweetheart deals" that lavish benefits on wealthy teams while imposing crushing financial hardships on cities that are already strapped with debt. To fans...