Forbes estimates the New York Yankees are baseball's most valuable team for the 18th straight year. Forbes claimed Wednesday the Yankees are worth $3.2 billion, up from $2.5 billion last year and matching the Dallas Cowboys for the high among U.S. teams. Forbes estimated the Yankees' revenue last year at $508 million. The magazine estimated the Dodgers are worth $2.4 billion and World Series champion San Francisco at $2 billion. More...