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Giants vs Cardinals Prediction 9/8/26 MLB Picks Today

St. Louis Cardinals (72-73) vs. San Francisco Giants (60-85)
September 8, 2026 9:45 pm EDT
The Line: San Francisco Giants -113 / St. Louis Cardinals -106; Over/Under: 7.5
(Get latest betting odds)

The San Francisco Giants and St. Louis Cardinals do battle Tuesday in an MLB contest at Oracle Park. Here’s a Giants vs Cardinals Prediction. This article will include a Giants vs Cardinals Pick.

St. Louis Cardinals Betting Preview

The St. Louis Cardinals are 72-73 this year and play the White Sox and Giants next. The St. Louis Cardinals are batting .244 on the season, with a .317 OBP and a .387 slugging percentage. The St. Louis Cardinals’ pitching staff has a 4.30 ERA and a 1.35 WHIP. Jordan Walker leads the St. Louis Cardinals with 157 hits and 100 RBI, while Alec Burleson and Ivan Herrera have combined for 293 hits and 168 RBI.

Quinn Mathews gets the ball for the St. Louis Cardinals, and he is 1-2 with a 4.38 ERA and 24 strikeouts this season. This will be Mathews’ first career game against the San Francisco Giants.

San Francisco Giants Betting Preview

The San Francisco Giants are 60-85 on the year and play the Padres and Cardinals next. The San Francisco Giants are batting .248 on the season, have a .309 OBP, and have a .407 slugging percentage. The San Francisco Giants’ pitching staff has a 4.37 ERA and a 1.36 WHIP. Rafael Devers leads the San Francisco Giants with 142 hits and 92 RBI, while Jung Hoo Lee and Willy Adames have combined for 247 hits and 104 RBI.

Landen Roupp gets the ball for the San Francisco Giants, and he is 8-13 with a 4.17 ERA and 137 strikeouts this season. This will be Roupp’s second career game against the St. Louis Cardinals.

Why the San Francisco Giants will win

  • The Cardinals have lost eight of their last nine games after going to extra innings.
  • The Giants have won each of their last six night games against the Cardinals following a home win.
  • The Giants have covered the run line each of their last five night games against NL Central opponents that held a losing record.
  • The Cardinals have failed to cover the run line in five of their last six night games against NL West opponents that held a losing record.
  • The Giants have won the first inning in five of their last six night games at Oracle Park.
  • The Cardinals have trailed after 5 innings in each of their last nine Tuesday games against NL West opponents that held a losing record.
  • The Giants have led after 3 innings in four of their last five home games against NL Central opponents.

Why the St. Louis Cardinals will win

  • The Cardinals have won each of their last seven night games against NL West opponents following a road loss.
  • The Giants have lost nine of their last 11 games as favorites against NL opponents following a win.
  • The Cardinals have covered the run line in each of their last 10 games as underdogs against the Giants.
  • The Giants have failed to cover the run line in nine of their last 10 games as home favorites against NL Central opponents following a win.
  • The Cardinals have led after 3 innings in three of their last four night games.
  • The Cardinals have led after 5 innings in eight of their last 10 road games against opponents that held a losing record.

Total Runs Facts

  • Eleven of the Cardinals’ last 12 road games have gone OVER the total runs line.
  • Six of the Giants’ last seven night games against NL opponents have gone OVER the total runs line.
  • There has been at least one run scored in the first inning in each of the Giants’ last 11 night games.
  • There has been at least one run scored in the first inning in six of the Cardinals’ last seven games as road underdogs.

San Francisco Giants Player Prop Facts

  • Rafael Devers has recorded at least one hit in each of the Giants’ last 12 night games against NL opponents that held a losing record.
  • Rafael Devers has hit a home run in each of the Giants’ last five night games against opponents that held a losing record.
  • Landen Roupp has recorded five or more strikeouts in each of his last 10 appearances with the Giants as home favorites.

St. Louis Cardinals Player Prop Facts

  • Ivan Herrera has recorded at least one hit in each of the Cardinals’ last 14 games against NL West opponents that held a losing record.
  • Ivan Herrera has hit a home run in four of the Cardinals’ last seven road games against NL West opponents that held a losing record.

Matchup/League Facts

  • The Giants rank 30th in the league for walks this season (402).
  • The Giants rank T1st in the league for home runs allowed this season (139).
  • The Cardinals rank 26th in the league for opponent batting average this season (.255).
  • The Cardinals rank T5th in the league for home runs allowed this season (144).

Giants vs Cardinals Prediction

I’m looking at the over in this spot. Mathews has a 4.38 ERA and 1.58 WHIP on the season, and he’s allowed 12 runs in his last 24.2 innings. Roupp has a 4.17 ERA and 1.29 WHIP on the season, and he’s allowed 15 earned runs in his last 31 innings. Mathews has a 5.21 ERA on the road, and Roupp has a 4.04 ERA at home. We should see some fireworks in this contest. Give me the over.

Randy Chambers's Free Pick: Over 7.5

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Randy Chambers

Randy has covered sports betting since 2014 and writes about everything from NFL to WNBA. Follow Randy Chambers on Twitter.

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