Doug made a start in Game 4 of the 2013 ALDS against the Oakland Athletics, with the Tigers facing elimination. He gave up three runs and seven hits in six innings of work. The Tigers won the game with a late rally, so Fister did not factor in the decision. In Game 4 of the 2013 ALCS against the Boston Red Sox, Fister gave up just one run on eight hits, striking out seven over six innings and earning the win in a 7–3 Tigers victory.