Today's starting pitching matchup features St. Louis Cardinals's Andre Pallante (10-6, 3.96 ERA) against Arizona Diamondbacks's Eduardo Rodriguez (8-3, 2.29 ERA).

Arizona Diamondbacks's Eduardo Rodriguez posts an elite 2.29 ERA this season, while Andre Pallante has been league-average at 3.96. There is a clear gap in starting pitching quality.

Advanced metrics: Andre Pallante — FIP 4.01, K% 17.0%, 100.0 IP / Eduardo Rodriguez — FIP 4.11, K% 17.1%, 114.0 IP

2026 season record: St. Louis Cardinals 51-46 (.526), Arizona Diamondbacks 50-48 (.510).

Recent form: St. Louis Cardinals on a 1-game losing streak, Arizona Diamondbacks on a 1-game win streak.

Based on starting pitching, Arizona Diamondbacks holds the edge.

St. Louis Cardinals bullpen: 13 relievers on the active roster. Key arms: Andre Pallante 3.96 ERA, 72K in 100.0IP, Dustin May 4.78 ERA, 95K in 98.0IP, George Soriano (Setup) 3.27 ERA, 36K in 41.1IP.

Arizona Diamondbacks bullpen: 13 relievers on the active roster. Key arms: Brandon Pfaadt 4.58 ERA, 44K in 59.0IP, Brandyn Garcia (Setup) 1.82 ERA, 28K in 24.2IP, Drey Jameson 4.11 ERA, 11K in 15.1IP.

Projected win probability: St. Louis Cardinals 43% vs Arizona Diamondbacks 57%

Factors: Arizona Diamondbacks's starter owns the lower ERA, Arizona Diamondbacks's home-field advantage. Of course, baseball's inherent randomness means actual results may differ.

Workload comparison: Andre Pallante averages 5.6 IP per start vs. Eduardo Rodriguez at 6.0 IP. Getting six-plus innings from the starter significantly eases the bullpen burden.

Eduardo Rodriguez has allowed 12 HR this season — a concern against a lineup with extra-base power.