The San Diego Padres head to Great American Ball Park on Wednesday, September 2, 2026, for a 12:40 PM ET matinee against the Cincinnati Reds. Casey Mize gets the start for San Diego against Cincinnati's Brandon Williamson in a regular-season matchup that carries real weight as the calendar pushes toward the final weeks of the year. With Fernando Tatis Jr. leading off and a lineup that features Jackson Merrill, Xander Bogaerts, and Ethan Salas, the Padres bring enough firepower to do damage in a ballpark that has historically been kind to hitters.

Padres vs. Reds Pitching Matchup: Casey Mize vs. Brandon Williamson

Casey Mize draws the start for San Diego. Mize's assignment here is straightforward: keep a Cincinnati lineup — built around Elly De La Cruz batting second and JJ Bleday hitting cleanup — off the board long enough to give the Padres offense a chance to do its work. Great American Ball Park is no pitcher's paradise, so Mize will need to be sharp with his command and not let the Reds' more dangerous bats turn a manageable deficit into a blowout.

Brandon Williamson takes the mound for Cincinnati. Williamson will face a Padres lineup that is capable of stringing together damage throughout the order. Tatis Jr. at the top creates immediate pressure, and the middle of the order — Merrill at three, Ty France at four, and Bogaerts at five — gives San Diego legitimate run-producing potential through six innings.

Keys to Watch for San Diego

• Tatis Jr. setting the table: With Fernando Tatis Jr. leading off from the two-hole at second base, his ability to get on base early puts immediate pressure on Williamson and changes the at-bats for every hitter behind him.
• Ethan Salas behind the dish: The young catcher hitting sixth gives San Diego a potential power threat lower in the order and makes the lineup harder to manage from the sixth spot down.
• Mize's early innings: How Mize handles the top of the Cincinnati order — Héctor Rodríguez, De La Cruz, and Sal Stewart — in the first two innings will set the tone for the afternoon.
• Cronenworth's role: Jake Cronenworth hitting ninth at third base is the kind of lineup construction that can surprise pitchers; if he reaches, it flips the order back to Tatis Jr. in high-leverage spots.
• Bullpen depth: A day game in a hitter-friendly park means the Padres' bullpen could be called on early. Roster management will matter in the final three innings.

Padres Lineup

• 1. Fernando Tatis Jr. — 2B
• 2. Samad Taylor — LF
• 3. Jackson Merrill — CF
• 4. Ty France — 1B
• 5. Xander Bogaerts — SS
• 6. Ethan Salas — C
• 7. Austin Hays — RF
• 8. Luis Campusano — DH
• 9. Jake Cronenworth — 3B

Prediction

This is a winnable game for San Diego. The Padres' lineup has enough depth to make Williamson work deep into counts, and if Mize can limit the damage De La Cruz does from the two-hole, the Padres have the personnel to grind out runs. Call it Padres 5, Reds 3. Catch the game on Padres.TV Presented by UC San Diego Health or on Spanish-language radio at XEMO 860.