Free agency is baseball's version of musical chairs.
For instance, when Keith Foulke signed with the Red Sox last Dec. 13, it had a ripple effect.
Five days after Foulke agreed to that multiyear contract, Oakland general manager Billy Beane brought in someone to replace him as the A's closer.
He signed Arthur Rhodes to a three-year, $9.2 million contract. The price seemed high, considering Rhodes was coming off a so-so season. In 67 games with the Mariners in 2003...