Mariners vs Rays Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 8

Odds updated as of 4:12 a.m.

Saturday's slate in the MLB includes a matchup between the Seattle Mariners and the Tampa Bay Rays.

We've got you covered, in terms of the most important info about this matchup before you take a look at the MLB odds and spreads on FanDuel Sportsbook.

Mariners vs Rays Game Info

• Seattle Mariners (56-61) vs. Tampa Bay Rays (69-46)
• Date: Saturday, August 8, 2026
• Time: 9:50 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: Mariners.TV and Rays.TV

Mariners vs Rays Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-122) | TB: (+104)
• Spread: SEA: -1.5 (+180) | TB: +1.5 (-220)
• Total: 7 -- Over: (-122) | Under: (+100)

Mariners vs Rays Probable Starting Pitchers

Probable Pitchers: George Kirby (Mariners) - 8-9, 3.76 ERA vs Griffin Jax (Rays) - 6-9, 3.63 ERA

This contest's pitching matchup is set, as the Mariners will send George Kirby (8-9) to the mound, while Griffin Jax (6-9) will answer the bell for the Rays. Kirby's team is 7-14-0 against the spread this season in his starts. Kirby's team is 11-10 this season when he starts and they are the moneyline favorite. The Rays are 9-9-0 against the spread when Jax starts. The Rays are 2-3 in Jax's five starts this season that they were the moneyline underdog.

Mariners vs Rays Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Rays win (51.7%)

Mariners vs Rays Moneyline

• Looking at the moneyline for Rays-Mariners, Tampa Bay is the underdog at +104, and Seattle is -122 playing at home.

Mariners vs Rays Spread

• The Rays are at +1.5 on the runline against the Mariners. The Rays are -220 to cover the spread, and the Mariners are +180.

Mariners vs Rays Over/Under

• An over/under of 7 has been set for Mariners-Rays on Aug. 8, with the over being -122 and the under +100.

Bet on Seattle Mariners vs. Tampa Bay Rays on FanDuel today!

Mariners vs Rays Betting Trends

• The Mariners have been favorites in 97 games this season and have come away with the win 49 times (50.5%) in those contests.
• This season Seattle has come away with a win 44 times in 79 chances when named as a favorite of at least -122 on the moneyline.
• The Mariners and their opponents have hit the over in 57 of their 116 games with a total set by oddsmakers this season.
• The Mariners are 41-75-0 against the spread in their 116 games that had a posted line this season.
• The Rays have been the underdog on the moneyline 35 total times this season. They've finished 17-18 in those games.
• In games it has played as a moneyline underdog with odds of +104 or longer, Tampa Bay has gone 9-11 (45%).
• In the 113 games bookmakers have set an over/under for the Rays, they have combined with opponents to go over the total 51 times (51-60-2).
• The Rays have a 65-48-0 record against the spread this season.

Mariners Player Leaders

• Randy Arozarena leads Seattle with 113 hits and a team-best slugging percentage of .451. He's batting .282 with an on-base percentage of .376.
• He is 27th in batting average, 13th in on-base percentage, and 53rd in slugging among all qualifying hitters in baseball.
• Julio Rodriguez is batting .260 with 16 doubles, 18 home runs and 35 walks, while slugging .429 with an on-base percentage of .323.
• Among qualified hitters, his batting average ranks him 63rd, his on-base percentage 85th, and his slugging percentage 72nd.
• Rodriguez takes a seven-game streak with at least one hit into this contest. In his last 10 games he is batting .316 with three home runs, five walks and six RBIs.
• Cole Young has 112 hits this season and has a slash line of .263/.323/.411.
• Josh Naylor has been key for Seattle with 109 hits, an OBP of .323 plus a slugging percentage of .352.

Rays Player Leaders

• Junior Caminero has totaled 123 hits with a .375 on-base percentage, leading the Rays in both statistics. He's batting .283 and slugging .556.
• Including all the qualifying hitters in the majors, he ranks 26th in batting average, 14th in on-base percentage and second in slugging percentage.
• Yandy Diaz's .452 slugging percentage paces his team. He has a batting average of .296 with an on-base percentage of .369.
• Including all qualified hitters, his batting average puts him ninth, his on-base percentage ranks 18th, and he is 52nd in slugging.
• Liam Hicks is batting .282 with 10 doubles, a triple, 15 home runs and 42 walks.
• Jonathan Aranda has a .375 OBP to lead his team.

Mariners vs Rays Head to Head

• 8/7/2026: 2-1 TB (Favorite: Mariners, Spread: -1.5, Total: 6.5, Favorite Moneyline: -112, Underdog Moneyline: +102)
• 7/12/2026: 8-2 SEA (Favorite: Rays, Spread: -1.5, Total: 7.5, Favorite Moneyline: -142, Underdog Moneyline: +120)
• 7/11/2026: 6-1 TB (Favorite: Rays, Spread: -1.5, Total: 7, Favorite Moneyline: -110, Underdog Moneyline: -106)
• 7/10/2026: 7-2 TB (Favorite: Rays, Spread: -1.5, Total: 8.5, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 9/3/2025: 9-4 TB (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 9/2/2025: 6-5 TB (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 9/1/2025: 10-2 TB (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -110, Underdog Moneyline: -106)
• 8/10/2025: 6-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -180, Underdog Moneyline: +152)
• 8/9/2025: 7-4 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -142, Underdog Moneyline: +120)
• 8/8/2025: 3-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -130, Underdog Moneyline: +110)

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