Don Mattingly will not return as the Dodgers' manager in 2016, a source confirmed Thursday. CBSsports.com first reported the story this morning, describing the decision as a mutual parting of ways. The Dodgers have not officially announced the decision.The move comes seven days after the Dodgers lost Game 5 of the National League Division Series to the New York Mets, marking the second consecutive season in which their season ended in the first round of the playoffs.