July 20, 2025 5:22 AM EST

St. Louis Cardinals vs Arizona Diamondbacks 7/20/2025

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The Arizona Diamondbacks are 23-25 at home this season and are heavy favorites to beat the St. Louis Cardinals who are 22-26 on the road this season. The Diamondbacks have a better than 60% chance of winning based on 10,000 game simulations generated one play at a time by the AccuScore Simulation Supercomputer. Diamondbacks starter Merrill Kelly is forecasted to have a better game than Cardinals starter Miles Mikolas. Merrill Kelly has a 57% chance of having a Quality Start (QS) while Miles Mikolas has a 35% chance of a QS. If Merrill Kelly has a quality start the Diamondbacks has a 83% chance of winning. His simulated strikeout to walk ratio is 3.7 and he has a 30% chance of having a 5 to 1 K/BB ratio. When he has a 5/1 ratio the Diamondbacks win 71%. In Miles Mikolas quality starts the Cardinals win 59%. He has a 26% chance of having a 5 to 1 K/BB ratio and if he does his team wins 59% of simulations. In simulations we tracked the batter for each team that was most productive based his average hits, walks and RBI per simulation. The most productive batter for the Arizona Diamondbacks is Ketel Marte who averaged 2.57 hits+walks+RBI. He has a 44% chance of having a big game with 3+ Hits, Walks, RBI and if he has a big game the Diamondbacks have a 76% chance of winning. The most productive batter for the St. Louis Cardinals is Ivan Herrera who averaged 2.16 hits+walks+RBI. He has a 36% chance of having a big game with 3+ Hits, Walks, RBI and if he has a big game the Cardinals have a 51% chance of winning.

CURRENT SEASON: We advise relying on these trends after the first 6 to 8 weeks of the season. UNITS EDGE FAVORS: St. Louis Cardinals

St. Louis CardinalsRECORDArizona DiamondbacksRECORDUNITS EDGE
Record on the Road22-26, 46% -385Record at Home23-25, 48% -770St. Louis Cardinals
VS Arizona Diamondbacks3-0, 100% 279VS St. Louis Cardinals0-3, 0% -300St. Louis Cardinals
vs Team Under .50026-15, 63% 857vs Team .500 or Better25-28, 47% -462St. Louis Cardinals
Record As Road Underdog13-19, 41% -373Record As Home Favorite17-22, 44% -1117St. Louis Cardinals
When Miles Mikolas Starts8-10, 44% -170When Merrill Kelly Starts9-9, 50% -194St. Louis Cardinals

PAST 30 DAYS: We advise incorporating these trends along with the current Season after the first 6 to 8 weeks. UNITS EDGE FAVORS: St. Louis Cardinals

St. Louis CardinalsRECORDArizona DiamondbacksRECORDUNITS EDGE
Record on the Road4-5, 44% -104Record at Home3-7, 30% -430St. Louis Cardinals
VS Arizona Diamondbacks0-0 No GamesVS St. Louis Cardinals0-0 No GamesN/A
vs Team Under .5005-1, 83% 292vs Team .500 or Better0-3, 0% -300St. Louis Cardinals
Record As Road Underdog2-3, 40% -73Record As Home Favorite2-6, 25% -458St. Louis Cardinals
When Miles Mikolas Starts1-2, 33% -101When Merrill Kelly Starts1-3, 25% -254St. Louis Cardinals

OVER-UNDER TRENDS

St. Louis CardinalsRECORDArizona DiamondbacksRECORDO-U EDGE
OVER-UNDER ON ROAD25-22, 53% OverOVER-UNDER AT HOME25-21, 54% OverOVER
ROAD OVER-UNDER PAST 30 DAYS4-5, 44% OverROAD OVER-UNDER PAST 30 DAYS7-3, 70% OverOVER
ROAD OVER-UNDER LAST SEASON36-41, 47% OverROAD OVER-UNDER LAST SEASON50-29, 63% OverOVER
OVER-UNDER IN Miles Mikolas STARTS10-8, 56% OverOVER-UNDER IN Merrill Kelly STARTS10-8, 56% OverN/A

ACCUSCORE ADVISOR: AccuScore simulates every game thousands of times one play at a time. We are the industry standard in sports forecasting and the only company to be paid for sports picks and predictions by the biggest sports companies in the world. Our newest product, the AccuScore Advisor, provides Side Value, Money Line and Over-Under picks for every MLB game and rates them as One, Two, Three or Four Star picks. Three and Four Star picks have delivered over +10,000 units of profit the past 2 seasons. Visit AccuScore.com to find out what AccuScore\'s Advisor recommends for this game. The following trends are AccuScore\'s RIGHT-WRONG records and units (+/-) when making picks involving these teams.

SIDE VALUE (Current Season) - St. Louis Cardinals Road Games: 25-23, 52% -21 Arizona Diamondbacks Home Games: 21-27, 44% -1027 SIDE VALUE (PAST 30 DAYS) - St. Louis Cardinals Road Games: 6-3, 67% +246 Arizona Diamondbacks Home Games: 3-7, 30% -430

MONEY LINE (Current Season) - St. Louis Cardinals Road Games: 29-19, 60% +360 Arizona Diamondbacks Home Games: 22-26, 46% -960 MONEY LINE (PAST 30 DAYS) - St. Louis Cardinals Road Games: 7-2, 78% +341 Arizona Diamondbacks Home Games: 3-7, 30% -430

OVER-UNDER RECORD (Current Season) - St. Louis Cardinals Road Games: 17-23, 42% -830 Arizona Diamondbacks Home Games: 20-20, 50% -200 OVER-UNDER RECORD (PAST 30 DAYS) - St. Louis Cardinals Road Games: 6-3, 67% + 270 Arizona Diamondbacks Home Games: 3-6, 33% -360

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