St. Louis Cardinals vs. Seattle Mariners: Game Preview, Odds, and Pitching Matchup for September 9, 2025

Tuesday, September 9th, 2025

St. Louis Cardinals at Seattle Mariners MLB Game Preview – September 9, 2025

The St. Louis Cardinals travel to the Pacific Northwest to take on the Seattle Mariners in the second matchup of their series at T-Mobile Park. This pivotal contest brings together two teams striving for playoff positioning as the regular season approaches its final stretch.

Pitching Matchup: Liberatore vs. Kirby

The Cardinals will send left-hander Matthew Liberatore to the mound. Liberatore enters the game with a 7-11 record, a 4.15 ERA, a 1.30 WHIP, and 109 strikeouts. For the Mariners, right-hander George Kirby (8-7, 4.47 ERA, 1.23 WHIP, 104 strikeouts) will get the start, aiming to build on his recent performances and help Seattle extend their home field success.

Team Records and Series Outlook

The Seattle Mariners hold a 42-27 home record and sit at 76-68 overall, firmly in second place in the AL West. The Mariners have excelled when their bats are hot, posting a 45-24 record in games when they record at least eight hits.

The St. Louis Cardinals are currently 72-73, fourth in the NL Central, with a 31-39 record away from Busch Stadium. Notably, the Cardinals are 37-17 in games when they prevent opponents from hitting a home run, showing the importance of strong pitching and defense for their success.

Top Performers to Watch

For Seattle, Cal Raleigh leads the power charge with 19 doubles and 53 home runs. Young star Julio Rodriguez is red hot, going 14-for-41 with two doubles, five home runs, and 17 RBIs in his last 10 games.

The Cardinals are paced by Alec Burleson, who boasts a team-best .286 batting average, along with 21 doubles, a triple, 17 home runs, 34 walks, and 62 RBI. Lars Nootbaar has contributed 11 hits and an RBI in the team's last 10 contests.

Recent Team Trends

The Mariners are 4-6 in their last 10 games, hitting .264 with a 4.39 ERA and outscoring opponents by nine runs in that span. The Cardinals have gone 6-4 over their last 10 games with a .209 team batting average and a 4.15 ERA, though they have been outscored by eight runs during that period.

Injury Updates

Seattle continues to manage injuries to key players, including Jackson Kowar (shoulder, 15-Day IL), Trent Thornton (achilles, 60-Day IL), Logan Evans (elbow, 15-Day IL), Gregory Santos (knee, 60-Day IL), and Ryan Bliss (biceps, 60-Day IL).

For the Cardinals, John King (back, 15-Day IL), Brendan Donovan (groin, 10-Day IL), Nolan Arenado (shoulder, 10-Day IL), and Zack Thompson (lat, 60-Day IL) remain sidelined.

Weather

Today at T-Mobile Park, expect mild baseball weather with temperatures around 69°F under mostly cloudy skies. There is a low 10% chance of precipitation, so rain should not impact the game. Winds are light from the southwest at 5–7 mph, making for comfortable playing and viewing conditions.

In summary

The St. Louis Cardinals and the Seattle Mariners continue their series in a game that could impact postseason aspirations for both squads. With St. Louis looking to even the series and Seattle aiming to strengthen their grip on an AL Wild Card spot, fans can expect a competitive matchup. Strong starting pitching, standout performances from sluggers like Cal Raleigh and Alec Burleson, and comfortable weather conditions set the stage for an exciting evening of baseball in Seattle.

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