Jeers peaked in the ninth, when Winker was ejected arguing balls and strikes with plate umpire Marty Foster. Kyle Farmer replaced Winker and struck out looking, with the punchout going on Winker’s record.
Mahle delivered five solid innings, with the only damage coming on Syndergaard’s strike. Mahle struck out seven with four hits and no walks.
The Reds entered with 99 runs allowed this season, tied with AL East-leading Tampa Bay for best in baseball. They allowed one run over the final 18 innings of the series.
Syndergaard came in with a 6.35 ERA. His velocity picked up a tick from where he’d been this season, topping out at 99 mph, and he bailed out a well-worn bullpen with an efficient effort, throwing 74 of his 104.
It was just the third complete-game shutout in the majors this season, following Colorado’s Marquez and Texas’ Mike Minor.
Syndergaard’s second homer this season was the sixth of his career, tying Tom Seaver for second among Mets pitchers, one behind Dwight Gooden’s team record.
New York entered with three homers from its pitching staff — including one each from Jacob deGrom and Zack Wheeler — which was tied with Arizona for the major league lead. The Mets’ four homers matched the franchise season record set in 2016.
Syndergaard’s shot was the 11th homer by a pitcher in the majors this season, on pace to easily surpass the 34 such drives in 2003 for the most since the introduction of the designated hitter in 1973.
Syndergaard got a standing ovation after hitting a flyball to deep center field in the eighth.
Robinson Cano singled in the first inning for the 2,499th hit of his career.
Reds 1B Joey Votto was out of the lineup for rest but entered as a pinch hitter.
Reds return home for four games against San Francisco. RHP Sonny Gray (0-4, 3.64) entered Thursday ranked seventh in wins above replacement (1.1, per Fangraphs). He’ll try for his first win against RHP Tyler Beede.