The St. Louis Cardinals wrap up their road trip in Philadelphia on Sunday, August 23, 2026, sending Kyle Leahy to the mound against Phillies left-hander Cristopher Sánchez at Citizens Bank Park for a 1:35 PM ET first pitch. This is a regular season contest with playoff positioning implications, and the Cardinals are rolling out a lineup heavy on young talent against one of the National League's most experienced rotations. Cardinals fans can catch the action on Cardinals.TV Presented by bet365 or listen in on KMOX 1120 AM/104.1 FM.

Cardinals vs. Phillies Starting Pitchers: Leahy Faces Sánchez

Kyle Leahy draws the start for St. Louis. The right-hander has worked his way into the Cardinals' rotation and will face a real test today against a Phillies lineup that can punish any mistake. Leahy's ability to keep the ball in the park and work efficiently through Philadelphia's deep order will be central to any Cardinals success this afternoon.

Cristopher Sánchez gets the ball for Philadelphia. The left-hander has been a dependable piece of the Phillies' rotation and presents the Cardinals' lineup with a genuine challenge. Against a southpaw, St. Louis will need its right-handed bats to carry the offensive load.

St. Louis Cardinals Lineup at Philadelphia

• JJ Wetherholt, SS
• Iván Herrera, DH
• Jordan Walker, RF
• Alec Burleson, 1B
• Joshua Báez, LF
• Blaze Jordan, 3B
• José Fermín, CF
• Ramón Urías, 2B
• Pedro Pagés, C

Philadelphia Phillies Lineup

• Kyle Schwarber, 1B
• Trea Turner, SS
• Bryce Harper, DH
• Bryson Stott, 2B
• Brandon Marsh, LF
• J.T. Realmuto, C
• Justin Crawford, CF
• Edmundo Sosa, 3B
• Bryan De La Cruz, RF

Keys to Watch for the Cardinals

Jordan Walker and Alec Burleson Must Produce Against a Left-Hander

With Sánchez on the mound, the Cardinals need their right-handed hitters to step up. Walker batting third and Burleson cleanup gives St. Louis legitimate middle-of-the-order thump, but they have to make Sánchez work and capitalize on any mistake in the zone. A big inning from that duo changes this game in a hurry.

JJ Wetherholt Setting the Table

Wetherholt leads off at shortstop and gives the Cardinals a legitimate on-base presence to spark the offense. Getting him on base in front of Iván Herrera and Walker early could set the tone and put pressure on Sánchez before he settles in.

Leahy Navigating the Heart of Philadelphia's Order

The Phillies have genuine threats from top to bottom, and the middle of their order — Harper, Turner, and Schwarber — can end a game without warning. Leahy has to establish his fastball early, keep Harper from getting extended, and avoid the big inning. One crooked number in Citizens Bank Park can feel like three anywhere else.

Blaze Jordan's Development Moment

Jordan at third base and batting sixth is worth monitoring. Citizens Bank Park is a proving ground, and how the young third baseman handles a hostile environment against a quality pitcher tells you something real about where he is as a hitter.

Prediction: Cardinals vs. Phillies, August 23

Citizens Bank Park is a tough venue on any day, and the Phillies present a difficult matchup for a Cardinals team leaning on youth throughout the lineup. Leahy will need a career-quality outing to keep St. Louis in this one. The Cardinals have the pieces to steal a game on the road, but the pitching edge belongs to Philadelphia today. Phillies 5, Cardinals 3.