For the season, Marquis posted a career-best 15–9 record, with a 3.71 ERA and a career-high 138 strikeouts, for the National League champions. He was 2nd in the NL in ground ball/fly ball ratio (2.17), tied for 5th in percentage of strikes that were "looking" (31%), 6th in pitches per start (104), 8th in won-lost percentage (.682), 9th in wins (15), and tied for 10th in double plays induced (21). He held batters to a .198 batting average with runners in scoring position, and a .163 batting average with 2 outs and runners in scoring position.