Sanchez will start Game 4 of the NLCS on Friday against the Diamondbacks, Todd Zolecki of MLB.com reports.
Taijuan Walker was the presumed starter for Game 4, but Sanchez will instead get the ball in a pivotal matchup. Sanchez pitched well during the regular season, maintaining a 3.44 ERA with a 20.2 K-BB% across 99.1 innings. He has yet to appear in a postseason contest during his career.