Rays vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for July 12

Odds updated as of 10:11 p.m.

In MLB action on Sunday, the Tampa Bay Rays play the Seattle Mariners.

All the information you need to make smart bets on this game at FanDuel Sportsbook can be found below. Check out all of the latest MLB betting lines here.

Rays vs Mariners Game Info

• Tampa Bay Rays (56-37) vs. Seattle Mariners (47-49)
• Date: Sunday, July 12, 2026
• Time: 1:40 p.m. ET
• Venue: Tropicana Field -- St. Petersburg, Florida
• Coverage: Rays.TV and Mariners.TV

Rays vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: TB: (-130) | SEA: (+110)
• Spread: TB: -1.5 (+172) | SEA: +1.5 (-210)
• Total: 7.5 -- Over: (-118) | Under: (-104)

Rays vs Mariners Probable Starting Pitchers

Probable Pitchers: Ian Seymour (Rays) - 6-1, 4.11 ERA vs Emerson Hancock (Mariners) - 6-4, 3.23 ERA

The probable starters are Ian Seymour (6-1) for the Rays and Emerson Hancock (6-4) for the Mariners. Seymour and his team have covered in each of the five games he's started with a spread this season. Seymour's team has a record of 3-1 this season when he starts and they are the favorite on the moneyline. The Mariners have gone 6-11-0 ATS in Hancock's 17 starts with a set spread. The Mariners were the moneyline underdog for two Hancock starts this season -- they split the games.

Rays vs Mariners Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Rays win (54.9%)

Rays vs Mariners Moneyline

• Looking at the moneyline for Rays-Mariners, Tampa Bay is the favorite at -130, and Seattle is +110 playing on the road.

Rays vs Mariners Spread

• The Rays are hosting the Mariners and are favored by 1.5 runs (+172 to cover) on the runline. Seattle is -210 to cover.

Rays vs Mariners Over/Under

• The Rays-Mariners game on July 12 has been given an over/under of 7.5 runs. The over is set at -118 and the under at -104.

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Rays vs Mariners Betting Trends

• The Rays have won in 39, or 65%, of the 60 contests they have been named as odds-on favorites in this year.
• This season Tampa Bay has been victorious 24 times in 35 chances when named as a favorite of at least -130 on the moneyline.
• The Rays and their opponents have gone over in 43 of their 92 games with a total set by sportsbooks this season.
• The Rays are 56-36-0 against the spread in their 92 games that had a posted line this season.
• The Mariners have won two of the 12 games they were listed as the moneyline underdog this season (16.7%).
• Seattle has played as a moneyline underdog of +110 or longer in only one game this season, which it lost.
• The Mariners have combined with opponents to hit the over on the total 45 times this season for a 45-46-4 record against the over/under.
• The Mariners have a 34-61-0 record against the spread this season (covering just 35.8% of the time).

Rays Player Leaders

• Junior Caminero has 99 hits, which ranks first among Tampa Bay hitters this season, while batting .281 with 42 extra-base hits. He has an on-base percentage of .373 and a slugging percentage of .560.
• Among qualified hitters in the majors, he ranks 35th in batting average, 22nd in on-base percentage, and seventh in slugging.
• Caminero has recorded at least one hit in three straight games. In his last five games he is batting .222 with two doubles, two home runs, three walks and three RBIs.
• Yandy Diaz leads the Rays with an OPS of .887. He has a slash line of .320/.397/.490 this season.
• Among qualified batters, he ranks third in batting average, sixth in on-base percentage and 28th in slugging percentage.
• Jonathan Aranda has collected 100 base hits, an OBP of .393 and a slugging percentage of .463 this season.
• Aranda enters this game with four games in a row with at least one hit. During his last five outings he is batting .526 with four doubles, two walks and four RBIs.
• Chandler Simpson has been key for Tampa Bay with 92 hits, an OBP of .318 plus a slugging percentage of .344.
• Simpson has hit safely in four games in a row. In his last five games he is hitting .350 with two triples and an RBI.

Mariners Player Leaders

• Randy Arozarena has accumulated an on-base percentage of .382, a slugging percentage of .453, and has 92 hits, all club-bests for the Mariners (while batting .288).
• He is 22nd in batting average, 15th in on-base percentage and 59th in slugging percentage among all qualifying batters in the majors.
• Arozarena enters this game on a three-game hitting streak. In his last five games he is hitting .313 with a home run, five walks and an RBI.
• Josh Naylor is batting .251 with 12 doubles, eight home runs and 29 walks. He's slugging .354 with an on-base percentage of .313.
• He ranks 81st in batting average, 110th in on-base percentage and 127th in slugging percentage in the big leagues.
• Cole Young is hitting .253 with 14 doubles, a triple, 11 home runs and 25 walks.
• Dominic Canzone is hitting .264 with 13 doubles, a triple, 15 home runs and 22 walks.

Rays vs Mariners Head to Head

• 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)
• 8/28/2024: 6-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -158, Underdog Moneyline: +134)
• 8/27/2024: 3-2 TB (Favorite: Mariners, Spread: -1.5, Total: 6.5, Favorite Moneyline: -162, Underdog Moneyline: +136)

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