Wochit News - According to sources, Don Mattingly has been hired as manager of the Miami Marlins. The former Yankees first baseman was fired as manager of the Los Angeles Dodgers last week despite a 446-363 record in five seasons, including NL West division titles in each of the last three. However, Mattingly's teams went just 8-11 in the post-season, winning just one playoff series in that span.