Detroit Tigers vs. Seattle Mariners, ALDS, Picks and Prediction, Saturday, October 4, 2025

Detroit (87-75) will be trying to steal home-field advantage when they visit T-Mobile Park on Saturday night to face Seattle (90-72) in Game 1 of the ALDS at 8:38 PM. ET. Read on to find out which team picks up the win in this Tigers vs. Mariners prediction. Need a hot take on the MLB Season? Check out our Free MLB Picks and cash in.

Neither team has announced their starter for the game.

Detroit and Seattle split their last 10 meetings. The Mariners won the regular season series, 4-2.

Detroit Going For Second Consecutive Win

The Tigers bounced back from their Game 2 loss to Cleveland in the wild-card round with a win in Game 3 to secure a spot in the ALDS.  Dillon Dingler hit a home run and Wenceel Perez drove in two runs to lead the Tigers over the Guardians 6-3. Reliever Kyle Finnegan picked up the win in relief after tossing 1.1 innings, allowing no hits and walks.

Detroit averages 4.65 runs per game, which is 11th in the league. Their .247 batting average is 16th in the league. Their .316 on base percentage is 14th, while their .413 slugging percentage is 11th.

Riley Greene has been the big bat for the Tigers. He leads the team with a .258 batting average, 36 home runs, and 111 RBI.

Detroit is giving up 4.25 runs per game, which is 15th in the league. They rank 20th in Quality Starts (52).  Opponents have a .241 batting average against the Tigers, which is 15th in the league. Their 3.95 ERA is 16th, while their 1.25 WHIP is 13th.

Seattle Trying To Snap Three-Game Losing Streak

The Mariners didn’t close out the regular season on a good note after dropping their final three games the Dodgers at home. However, they won the AL West by three games over Houston, who missed the playoffs.

Seattle averages 4.73 runs per game, which is ninth in the league. Their .244 batting average is 20th in the league. Their .320 on base percentage is 11th, while their .420 slugging percentage is 10th.

Julio Rodriguez leads Seattle with a .267 batting average, while catcher Cal Raleigh (-210 to win the MVP) leads the team with 60 home runs and 125 RBI.

Seattle is giving up 4.28 runs per game, which is 17th in the league. Opponents have a .241 batting average against the Mariners, which is 12th in the league. Their 3.87 ERA is 13th, while their 1.22 WHIP is fifth. Seattle has plenty of options to start this game, led by Bryan Woo (15-7, 2.94 ERA) and Luis Castillo (11-8, 3.54 ERA). However, Woo is dealing with a pectoral injury so the Mariners might have to push his start back, so Castillo is likely to get the nod.

Tigers vs Mariners Game 1, Pick

Money Line Pick for Game 1, Tigers vs. Mariners

• Detroit Tigers ML (4 Units)

The Tigers have won two of their last three games, while the Mariners have lost three straight games. Detroit has the edge here because they’ve hit the ball well against right-handers, and they’re likely going to be facing Luis Castillo, who has struggled against them and gave up eight runs in his last three starts against the Tigers. Lefties hit .278 against him and the Tigers have Kerry Carpenter (26 HRs), Perez (13 HRs), Riley Greene (36 HRs), and Zach McKinstry (12 HRs), who hit from the left side of the plate.

Seattle won’t be as successful offensively because they didn’t hit the ball well in recent games, and they’re likely going to be facing Tarik Skubal, who gave up five runs in his last three starts. He gave up seven runs in his last three road starts against the Mariners, and he will keep their offense in check. Take Detroit on the money line.

Over/Under Pick for Tigers vs. Mariners

• Under (4 Units)

The Tigers played under the total in five of their last seven games, while the Mariners played under the total in their last three games. Detroit averages 4.65 runs per game and averaged three runs per game in their last three games. They’re batting .240 against right-handers, and they’re facing a starter who gave up three runs in his last four starts. The Mariners average 4.73 runs per game and averaged two runs per game in their last three games. They’re batting .241 against left-handers, and they’re going up against a starter who gave up five runs in his last three starts. Don’t expect these teams to score enough runs to push the score over the total.