These same two starting pitchers, Jack Flaherty and Mike Foltynewicz, just went against each other this past Friday. Final score was Braves 3, Cardinals 0. Both pitched well especially Foltynewicz, who gave up just three hits with no walks and had seven strikeouts in seven innings. 
Flaherty allowed three runs in seven innings. He gave up eight hits and one walk with eight strikeouts. 
This wasn't a fluke. Flaherty and Foltynewicz have been hot for quite a while. 
Flaherty was the NL Pitcher of the Month for August AND September. He went 7-2 with 0.91 ERA after the All-Star break. The Under is 13-3-2 (81 percent) in his past 18 starts. 
Foltynewicz went 6-1 with a 2.65 ERA during his last 10 starts. 
The loser of this game is eliminated. So each manager won't hesitate to use his best pitchers in relief if necessary. 
Weather-wise, there is a slight breeze blowing in.