Mariners vs. Rays Prediction, Odds, Picks - August 9

The Seattle Mariners and Tampa Bay Rays square off on Saturday at 9:40 p.m. ET. Josh Naylor and Junior Caminero have been on a tear as of late for their respective clubs. Oddsmakers list the Mariners as -188 favorites on the moneyline, while giving the underdog Rays +156 moneyline odds. Seattle is the favorite on the run line (-1.5). The game's over/under is set at 7.5 runs.

Here's everything you need from a betting perspective on the Mariners-Rays game, regarding the run line, moneyline and total, plus expert picks.

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Rays vs. Mariners Highlights | MLB on FOX

Check out the best highlights between the Tampa Bay Rays and Seattle Mariners.

Mariners vs. Rays Game Information & Odds

• When: Saturday, August 9, 2025 at 9:40 p.m. ET
• Where: T-Mobile Park in Seattle, Washington
• How to watch on TV: MLB Network, ROOT Sports NW, and FDSSUN

Mariners vs. Rays Prediction

• Score Prediction: Mariners 5, Rays 4
• Total Prediction: Over 7.5 runs
• Win Probabilities: Mariners 53%, Rays 47%

Mariners vs. Rays Betting Insights

• The Mariners have been favorites in 79 games this season and won 44 (55.7%) of those contests.
• Seattle has a record of 7-2, a 77.8% win rate, when favored by -188 or more by sportsbooks this season.
• The moneyline for this contest implies a 65.3% chance of a victory for the Mariners.
• The Rays have been chosen as underdogs in 58 games this year and have walked away with the win 24 times (41.4%) in those games.
• Tampa Bay has a mark of 1-3 in contests where sportsbooks favor it by +156 or worse on the moneyline.
• The moneyline set for this matchup implies the Rays have a 39.1% chance of walking away with the win.

Mariners Recent Betting Performance

• The Mariners have a 6-3 record over the nine games they were favored on the moneyline in their last 10 matchups.
• Over their last 10 outings, the Mariners and their opponents combined to hit the over four times (all 10 of the games had set totals).
• The Mariners have put together a 4-6-0 record against the spread over their past 10 games.

Mariners Recent Stats

Mariners Player Insights

• Cal Raleigh is the Mariners best power option, connecting on 43 long balls this season in addition to delivering 93 RBI, both team highs.
• Raleigh's home runs put him first in MLB, and he is second in RBI.
• Naylor's .289 batting average is a team-high mark.
• Naylor is 93rd in homers and 32nd in RBI among all hitters in MLB.
• Eugenio Suarez has 20 doubles, 37 home runs and 30 walks while batting .237.
• Julio Rodriguez has 19 doubles, three triples, 21 home runs and 31 walks while hitting .252.

Mariners Team Props

Rays Recent Betting Performance

• In eight games as underdogs over the last 10 matchups, the Rays have a record of 2-6.
• In their last 10 games with a total, the Rays and their opponents are 3-5-2 when it comes to hitting the over.
• The Rays have four wins against the spread in their last 10 chances.

Rays Recent Stats

Rays Player Insights

• Caminero has a team-leading 31 home runs and has driven in 77 runs.
• In all of the big leagues, Caminero ranks sixth in home runs and 12th in RBI.
• Caminero brings a hitting streak of three games into this game. In his last five games he is hitting .389 with three home runs, a walk and five RBIs.
• Yandy Diaz is batting .279 with 20 doubles, a triple, 20 home runs and 37 walks.
• Diaz ranks 35th among all hitters in the majors in homers, and 27th in RBI.
• Brandon Lowe is hitting .274 with 12 doubles, 21 home runs and 26 walks.
• Chandler Simpson is hitting .288 with nine doubles, a triple and 13 walks.

Rays Team Props

Rays vs. Mariners Highlights | MLB on FOX

Check out the best highlights between the Tampa Bay Rays and Seattle Mariners.

FOX Sports created this story using technology provided by Data Skrive and data from Sportradar.

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