After another disappointing postseason , the Los Angeles Dodgers and their manager, Don Mattingly, have agreed to go their separate ways — ending a five-year relationship in which Mattingly carried a .551 winning percentage, won the NL West the last three seasons, yet never made the World Series. In L.A., the stakes are that high. Just getting into the playoffs and putting up a good fight against the New York Mets (which the Dodgers did in a five-game NLDS), aren't enough. This is the most expensive team in the baseball, a $300 million would-be juggernaut to which anything less than the World Series is a failure. [ Related: Ten big reasons why the New York Mets are headed to the World Series ]