Gallen will start Monday against the Phillies in Game 1 of the NLCS, Nick Piecoro of The Arizona Republic reports.
Gallen has allowed four runs across 11.1 innings over his two postseason starts, earning himself the honor of starting Game 1 of Arizona's first NLCS appearance in 16 years. The right-hander surrendered two runs over 5.2 innings while striking out three batters and walking two during his lone 2023 regular-season matchup with the Phillies in May.