Sunday’s series finale between the Seattle Mariners and the Detroit Tigers at Comerica Park closes a compelling four-game set between two postseason-hopeful teams that have showcased contrasting styles throughout the first half of the 2025 season. The Tigers, holding the best record in baseball for most of the first half, have looked slightly vulnerable in this series after dropping back-to-back games to the Mariners, and they’ll be looking to avoid a rare series loss on their home turf. Detroit enters this game with an impressive 16–9 ATS record over their last 25 games and has been led offensively by All-Star outfielder Riley Greene, veteran slugger Javier Báez, and breakout corner infielder Colt Keith. They’ll be sending Jack Flaherty to the mound, whose season has been marked by inconsistency despite flashes of brilliance—Flaherty owns a mid-4.00s ERA and continues to battle control issues, making his performance a critical factor in Sunday’s outcome. On the other side, Seattle is expected to counter with Emerson Hancock or potentially Bryce Miller, depending on injury status, both of whom bring mid-rotation upside but have been limited recently by short outings and injury recovery. The Mariners’ offense has relied heavily on Cal Raleigh, whose historic power surge as a catcher has helped carry the team’s run production in July, while Julio Rodríguez has been heating up with a mix of speed, defense, and hard contact.

Seattle’s pitching strategy leans on a strong bullpen, with arms like Andrés Muñoz and Matt Brash anchoring the late innings and helping them remain competitive in close games. The Mariners’ 3–2 ATS record in their last five games shows they’ve been covering spreads with improved efficiency, especially on the road, and their ability to frustrate aggressive lineups with offspeed-heavy pitching has worked well against Detroit so far. The Tigers, however, still boast one of the league’s most productive lineups from top to bottom, with Spencer Torkelson’s power and Gleyber Torres’ consistency providing constant pressure on opposing pitchers. Defensively, both teams rank in the upper third of the league, but Seattle’s middle infield, especially with J.P. Crawford and Jorge Polanco healthy, gives them an edge in turning double plays and limiting extra-base damage. From a betting perspective, the over/under is set at 8, suggesting a moderately low-scoring affair, with Seattle entering as narrow –1.5 run-line favorites despite the Tigers having the better record, which reflects the recent results in the series and the strength of Seattle’s pitching depth. The key to this game will be how deep either starter can go, as both bullpens are capable but overworked after three straight competitive games. If Flaherty can command his secondary pitches and avoid early trouble, Detroit’s offense could open things up by the middle innings. But if Seattle’s starter delivers five solid frames and the bullpen takes over with a lead, the Mariners could steal another one and walk into the All-Star break with a confidence-boosting road series win over MLB’s top team. Expect a tight game decided by bullpen execution, timely hitting, and whichever team avoids giving away extra outs in a game that feels every bit like a postseason tune-up.