Detroit Tigers vs. Seattle Mariners Picks and Predictions, Saturday October 4, 2025
Use Code SSWC The MLB Playoffs got off to a stellar start, and now, the Division Series are on the way, and we'll look into an intriguing matchup with our Detroit Tigers vs. Seattle Mariners prediction.
The Detroit Tigers lost their hefty lead in the American League Central late in the year, but after getting revenge on the Cleveland Guardians, they now look to cause a major upset on the road to start their ALDS series.
On Saturday they begin their series with the Seattle Mariners, a team that continue consistently all season long in 2025, and with a top MVP candidate and fantastic pitching, this is a team that has their eyes on a World Series run. Read on to see our Detroit Tigers vs. Seattle Mariners prediction.
Expected pitching matchup: RHP Troy Melton vs. RHP George Kirby.
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Can the Tigers continue their momentum from the ALDS?
The Detroit Tigers had an embarrassing collapse to end the regular season, but with a 41-40 record away from home this season, they come into this series full of momentum and confidence, even against a fantastic Mariners team. In two wins in the Wild Card series against Cleveland, Detroit allowed just four total runs while scoring eight in all games played on the road, and if they can find that consistency again, this isn't a team that can be taken lightly.
In this one, Detroit turns to 24-year-old rookie Troy Melton, who has just 16 MLB appearances under his belt, tallying a 2.76 ERA across 45.2 innings of work, with the rookie impressing by posting 36 strikeouts in that time. Last time out for the Tigers was a decisive series win over the Cleveland Guardians, with two RBI to Wenceel Perez leading an offensive breakout as Jack Flaherty gave up just one run over 4.2 innings of work, leading to the 6-3 victory.
Can the Mariners start their World Series quest with a win?
The Seattle Mariners were up-and-down at times in 2025, but when it mattered most, this team was red-hot as they posted a 51-30 record at home en route to the American League West division title and the second seed in the American League. All season long, the Mariners ranked ninth in baseball in runs scored, and with a team ERA of 3.97, this is a team that has the chance to do something very special in 2025.
On the mound for Seattle in this one will be star right-hander George Kirby, who posted a 4.21 ERA across 23 appearances this season, but with 137 strikeouts in 126.0 innings of work, he's shown he has the stuff to succeed in the postseason. Unlike Detroit, the Mariners have been off for the past week, but they come into the playoffs after being swept in their last series at home, so they'll look to bounce back after freshening up in their week off.
Detroit Tigers vs. Seattle Mariners pick
Moneyline pick for Tigers vs. Mariners
- Seattle -1.5 (4 units)
Given the major advantage they've got on the mound, it's no surprise that the Seattle Mariners come into this one as the favorites, and with a week off to freshen up, this team should come into this matchup rested and full of confidence.
In six head-to-head matchups in 2025, the Mariners came away winners in four of those games, and after they came away winners 15-7 in George Kirby's only start against Detroit this year, expect them to start the ALDS with a big-time victory.
Over/under pick for Tigers vs. Mariners
- Over 7 (4 units)
Coming into this matchup, much of the focus should be on the starting pitching, but in six head-to-head encounters this season, the over was 3-3, with an average of 12 combined total runs scored in those matchups.
For the Tigers, the over sits at 2-1 in the postseason thus far, with an average of seven total runs scored in that series against the Guardians, and for the Mariners, the over comes in at 4-2 in their last six games played at home, with an average of 4.5 runs scored per game in that stretch.
Keep it simple, take the over.
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