The first manager in Diamondbacks history has a history of leaving teams immediately before they win titles, which should be good news to fans of his current team should he leave anytime soon. Despite finishing with a winning percentage of .514 for an expansion team, he did not, in fact, stop in Arizona past the 2000 season. Name this manager who has won manager of the year on three occasions, with three different American League teams.
Buck Showalter