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MLB Prop Bets: Seattle Mariners vs Tampa Bay Rays (August 7, 2026)

The Tampa Bay Rays (68-46) face the Seattle Mariners (56-59) at T-Mobile Park on Friday at 9:45pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Drew Rasmussen is the probable pitcher for the Rays, while Logan Gilbert is the probable pitcher for the Mariners.

  • The Rays have a 50-60-4 O/U record this season (meaning 50 games have gone over the total runs line, 60 have gone under and four have resulted in a push). The Mariners have a 56-51-8 O/U record.

Scoring Insights

  • The Rays are averaging 4.5 runs per game this season (15th in the league). Comparatively, the Mariners are averaging only 4.0 (28th).
  • In the field, the Rays are allowing 4.1 runs per game this season (8th in the league), while the Mariners are allowing an average of 4.0 runs (7th).

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, the Rays are at an impressive .258 (ranking 2nd in the Major leagues), while the Mariners are batting an underwhelming .230 (29th).

Home Runs

  • In terms of total home runs this season, the Mariners have hit 134 (15th in the Major Leagues). Meanwhile, the Rays have managed 116 (T24th).

Runs Batted In

  • Finally, looking at their runs batted in, the Rays have recorded 485 RBIs to rank 17th in the MLB this season. Comparatively, the Mariners have recorded 442 RBIs to rank 28th.

Pitching Insights:

Earned Run Average

  • The Mariners have an earned run average of 3.77 this season (9th in the Majors), while The Rays have an ERA of 3.74 (6th).

Strikeouts

  • Turning our attention to total strikeouts, the Rays have recorded 931 this season, ranking 21st in the MLB. Meanwhile, the Mariners rank 11th for total strikeouts, recording 980.

Opponent Batting Average

  • Opponents are batting an average of .242 against the Mariners this season (15th in the Major Leagues). Comparatively, the Rays' opponents are at .230 (5th).

First Innings Moneyline

  • Here are their first innings moneyline records in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Rays 29-23-62 15-11-33 14-12-29 21-18-37 8-5-25 0-0-0 3-3-4
    Mariners 25-29-61 16-13-29 9-16-32 24-22-49 1-7-12 0-0-0 3-5-2

Lead After Three Innings

  • Here are their records after the first three innings in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Rays 45-36-33 24-19-16 21-17-17 35-26-15 10-10-18 0-0-0 4-3-3
    Mariners 44-43-28 26-18-14 18-25-14 36-34-25 8-9-3 0-0-0 3-5-2

NRFI/YRFI

  • The NRFI is 58-56 in Rays games this season. The Mariners have a 56-59 NRFI record.

Last Time They Met

The Mariners recorded an 8-2 victory over the Rays at Tropicana Field when these teams last met on July 12. J.P. Crawford went yard en route to that victory, hitting a home run to go with 3 RBIs. That result snapped the Rays' five-game winning streak against the Mariners.