The Nationals have three outstanding starting pitchers. Anibal Sanchez isn't one of them. 
It's Sanchez who draws the start in Game 1 of the NL Championship Series today. He's backed up by one of the worst bullpens in the majors. And the Nationals won't be resorting to using Max Scherzer, Stephen Strasburg and Patrick Corbin in relief when they have to dip into their bullpen. Not with those three studs drawing heavy action in the Nationals' playoff series win against the Dodgers. 
The underdog Nationals took out the Dodgers winning the pivotal Game 5 in extra innings this past Wednesday in LA. Washington still may be hung over with such a short turnaround opening this series in St. Louis. Washington has lost seven of its last nine games to St. Louis.
I prefer Cardinals starter Miles Mikolas to Sanchez. Mikolas is a solid No. 3 type starter, while Sanchez is more bottom of the rotation. Mikolas has a 2.98 ERA at home this season. St. Louis is 16-7 in Mikolas' last 23 home starts. 
Sanchez is 2-4 with 3.44 career ERA in eight career starts versus St. Louis.