On May 27, Lynn pitched his first career complete game against the New York Yankees, a shutout. Making his 100th career MLB appearance and another start against the Nationals on Friday, June 13, Lynn pitched five perfect innings on his way to two hits through eight innings in a 1–0 victory over Jordan Zimmermann. In a 3–2 loss to the New York Mets five days later, he notched his 500th career strikeout, through 503 career innings. Baffling the Colorado Rockies on the corners of the strike zone on June 23, Lynn pitched another eight shutout innings in an 8–0 victory at Coors Field while allowing just three hits. The Cardinals made the playoffs again in 2014, and Lynn started one game each in the NLDS against the Dodgers and in the NLCS against the Giants. He finished with a 3.08 combined ERA and 11 strikeouts in innings.