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MLB Prop Bets: Seattle Mariners vs Detroit Tigers (October 4, 2025)

The Detroit Tigers face the Seattle Mariners at T-Mobile Park in Game 1 of the MLB League Division Round on Saturday at 8:38pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Troy Melton is the probable pitcher for the Tigers, while George Kirby is the probable pitcher for the Mariners. The Mariners are favored to win at -195, while the Tigers are at +158. The total runs line is set at 7.0, with OVER at -108 and UNDER at -113.

  • The Tigers (-137) have a 76-89 Run Line record since the beginning of the regular season, while the Mariners (+113) hold a record of 69-93.
  • The Tigers have an 84-71-10 O/U record since the beginning of the regular season (meaning 84 games have gone over the total runs line, 71 have gone under and 10 have resulted in a push). The Mariners have an 88-67-7 O/U record.

Scoring Insights

  • The Tigers are averaging 4.7 runs per game [this season/during the regular season] (11th in the league). Comparatively, the Mariners are averaging 4.7 (T9th).
  • In the field, the Tigers are allowing 4.3 runs per game [this season/during the regular season] (16th in the league), while the Mariners are allowing an average of 4.3 runs (17th).

Let's take a look at how these teams perform in some other key statistical areas.

Batting Insights:

Batting Average

  • Looking at their batting averages [this season/during the regular season], the Tigers are at .247 (ranking 16th in the Major leagues), while the Mariners are batting .244 (20th).

Home Runs

  • In terms of total home runs [this season/during the regular season], the Mariners have hit 238 (3rd in the Major Leagues). Meanwhile, the Tigers have managed 198 (10th).

Runs Batted In

  • Finally, looking at their runs batted in, the Tigers have recorded 724 RBIs to rank 11th in the MLB [this season/during the regular season]. Comparatively, the Mariners have recorded 734 RBIs to rank 10th.

Pitching Insights:

Earned Run Average

  • The Mariners have an earned run average of 3.87 [this season/during the regular season] (13th in the Majors), while The Tigers have an ERA of 3.95 (16th).

Strikeouts

  • Turning our attention to total strikeouts, the Tigers have recorded 1375 [this season/during the regular season], ranking 14th in the MLB. Meanwhile, the Mariners rank 7th for total strikeouts, recording 1426.

Opponent Batting Average

  • Opponents are batting an average of .241 against the Mariners [this season/during the regular season] (12th in the Major Leagues). Comparatively, the Tigers' opponents are at .241 (15th).

First Innings Moneyline

  • Here are their first innings moneyline records in 2025 (including playoffs).
    Total Home Road Favorite Underdog Neutral Last 10
    Tigers 40-35-90 23-15-43 17-20-47 26-21-62 14-14-28 0-0-0 2-2-6
    Mariners 38-35-89 17-14-50 21-21-38 30-23-65 8-12-24 0-0-1 4-0-6

Lead After Three Innings

The Tigers are +140 to lead after three innings, while the Mariners are -180.

  • Here are their records after the first three innings in 2025 (including playoffs).
    Total Home Road Favorite Underdog Neutral Last 10
    Tigers 74-57-34 39-24-18 35-33-16 50-33-26 24-24-8 0-0-0 4-5-1
    Mariners 64-53-45 33-20-28 31-32-17 51-32-35 13-21-10 0-1-0 6-3-1

NRFI/YRFI

The NRFI market is paying -150 and the YRFI is paying +115.

  • The NRFI is 89-76 in Tigers games [this season/during the regular season]. The Mariners have an 82-80 NRFI record.

Last Time They Met

The Mariners recorded an 8-4 victory over the Tigers at Comerica Park when these teams last met on July 13. The Mariners have now won four straight against the Tigers. Julio Rodriguez was unstoppable in that matchup, hitting a home run, a double and recording 2 RBIs.