Overview

• Philadelphia has clinched the NL East and reworked its rotation, starting Taijuan Walker in the opener with Walker Buehler expected to cover multiple innings and Cristopher Sanchez pushed to Tuesday.
• Ryne Nelson takes the ball for Arizona after a late-season surge that includes a 2.40 ERA over his past five starts and strong splits against left-handed hitters.
• Local analysis frames the series as must-sweep for the Diamondbacks, who are tied with the Reds and trail the Mets by two games in the wild-card race.
• The Phillies are 30-15 since the trade deadline, with Kyle Schwarber leading the NL with 53 home runs and topping MLB with 128 RBIs.
• Injury notes for Philadelphia include Trea Turner progressing from a Sept. 7 hamstring strain with a potential regular-season return, Alec Bohm working back from a shoulder issue, and Zack Wheeler out for the season with a shoulder injury.