Detroit Tigers vs Seattle Mariners Prediction, 10/4/2025 MLB Picks, Best Bets & Odds

Game: Detroit Tigers vs Seattle Mariners

Date: Saturday, October 4, 2025

Location: T-Mobile Park in Seattle, WA

TV: FS1

Odds/Point Spread: Detroit (+185) Seattle (-225)

The Seattle Mariners (90-72) are welcoming the Detroit Tigers (87-75) at T-Mobile Park on Saturday in Game 1 of the ALDS. The moneyline on this contest has Detroit at +185 and Seattle is coming in at -225. The over/under comes in at 7. The pitchers who are expected to start will be Keider Montero and Luis Castillo.

Detroit is slugging .413 and have struck out 1,454 times, while drawing a walk on 511 occasions. They have accrued 724 RBI's as well as 1,346 hits on the campaign, while their batting average is sitting at .247. The Tigers have hit 244 two-baggers as a team and have hit 198 baseballs out of the park. They have accumulated 758 runs scored while holding a team OBP of .316. As a team, the Detroit Tigers are putting up 4.7 runs/g, which puts them at 11th in baseball.

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Their strikeout to walk ratio sits at 2.84 and the pitching staff has recorded a WHIP of 1.25. Tigers pitchers have surrendered 187 home runs in addition to 691 total runs (16th in MLB). Detroit has given up 1,309 base hits (8.2 per 9 innings) in addition to 630 earned runs. The Tigers have an earned run average of 3.95 for the year (16th in the league), and the staff has struck out 1,375 hitters. They have walked 485 opposing players and their FIP sits at 4.05 as a squad for the year.

The Tigers relief pitchers have a save rate of 64.5% and have entered the game in 142 save situations. The relievers have inherited 258 runners so far this season with 28.7% of those runners crossed home plate. Tigers relief pitchers have come into the game with players on base 182 times and also have had 140 appearances in high leverage situations. The Tigers have sent 508 relief pitchers to the mound on the campaign. The relief pitchers have notched 75 holds this season (26th in MLB). They have recorded 40 saves on the season and have missed out on 22 of their 62 save opportunities.

The Tigers have converted 70.2% of balls hit into play into outs in their 12,927 innings on the diamond, ranking them 13th in MLB. The Colorado Rockies have accumulated 4,309 putouts this year, as well as 1,379 assists and 79 errors. Their fielding percentage is holding at .986 which ranks 14th in MLB, and they have turned 128 double plays.

Montero has thrown 188 innings and has tallied 149 strikeouts so far in his pro baseball career. Montero (11-9 win-loss mark in his career) sits with a FIP of 4.52 and he has faced 801 opposing hitters in the major leagues. His earned run average is 4.59 (96 ER's allowed) and his career WHIP is 1.365. He has given up 195 base knocks (9.3 hits per nine innings) with 62 walks.

The Seattle Mariners have a team OBP of .320 in addition to a batting average of .244 this year. They have been rung up on 1,446 occasions (6th in baseball) and have 1,345 base knocks. Seattle has accounted for 238 home runs for the year to go along with 734 RBIs. The Mariners hold a slugging percentage of .420 and they average 4.73 runs per game (10th in baseball). They have hit 234 doubles, while getting a free base 544 times as well as putting up 766 runs.

The Mariners hold a team WHIP of 1.221 and are the owners of a FIP of 3.98 as a staff on the campaign. They sit at 15th in MLB as a pitching staff in total hits surrendered with 1,331. The Seattle pitching staff have conceded 694 runs this year while holding an ERA of 3.87 (629 earned runs yielded). Their K/BB ratio comes in at 8.80 (1,426 strikeouts vs 454 bases on balls). They have surrendered 192 homers and they yield 4.27 runs per 9 innings (13th in MLB).

Seattle has called on relief pitchers to take the mound in 69 save chances and they have earned 43 saves. They sit at 19th in MLB with a save rate of 62.3%, and they have dispatched 550 relief pitchers onto the field on the season. Their relievers have taken the field 216 times in high leverage situations and also on 132 occasions with runners on. Seattle relievers have an inherited score rate of 25.2% of 147 inherited runners. Sitting with 159 save situations, the Mariners have recorded 90 holds in addition to 26 blown saves.

In 13,164 innings on the diamond, the Mariners have a efficiency on defense of 70.3% (12th in the majors). The Seattle Mariners have turned 118 double plays and have a fielding rate of .988 (7th in pro baseball). The Mariners have accrued 1,355 assists, 69 errors and have a tally of 4,388 putouts so far this season.

In his MLB career, Castillo has given up 1,208 base hits and he has 1,493 strikeouts in 1,410 innings pitched. He has allowed a total of 557 earned runs while holding a WHIP of 1.178 and a FIP of 3.5. He has a K/BB ratio of 3.30 and he has gone up against 5,824 opposing batters in his MLB career. Castillo (84-84 win-loss mark in his career) has a 3.55 earned run average while giving up 7.7 hits per 9 innings.

Who will win tonight's MLB game against the spread or moneyline?

Parlay's Pundit's Pick: Take Seattle (-225) and under 7 runs

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