Mariners vs Guardians Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 30

Odds updated as of 7:15 a.m.

The MLB's Saturday slate includes the Seattle Mariners facing the Cleveland Guardians.

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

Mariners vs Guardians Game Info

• Seattle Mariners (72-63) vs. Cleveland Guardians (67-66)
• Date: Saturday, August 30, 2025
• Time: 7:15 p.m. ET
• Venue: Progressive Field -- Cleveland, Ohio
• Coverage: FOX

Mariners vs Guardians Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-142) | CLE: (+120)
• Spread: SEA: -1.5 (+116) | CLE: +1.5 (-140)
• Total: 7.5 -- Over: (-110) | Under: (-110)

Mariners vs Guardians Probable Starting Pitchers

Probable Pitchers: Logan Gilbert (Mariners) - 4-5, 3.69 ERA vs Gavin Williams (Guardians) - 8-5, 3.36 ERA

The probable starters are Logan Gilbert (4-5) for the Mariners and Gavin Williams (8-5) for the Guardians. Gilbert's team is 6-12-0 against the spread in his starts this season. Gilbert's team has a record of 11-4 this season when he starts and they are the favorite on the moneyline. The Guardians have gone 11-15-0 against the spread when Williams starts. The Guardians have been the underdog on the moneyline in 16 of Williams' starts this season, and they went 6-10 in those matchups.

Mariners vs Guardians Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (64.6%)

Mariners vs Guardians Moneyline

• Cleveland is a +120 underdog on the moneyline, while Seattle is a -142 favorite on the road.

Mariners vs Guardians Spread

• The Mariners are at the Guardians and are favored by 1.5 runs (+116 to cover) on the runline. Cleveland is -140 to cover.

Mariners vs Guardians Over/Under

• A combined run total of 7.5 has been set for Mariners-Guardians on Aug. 30, with the over at -110 and the under at -110.

Bet on Seattle Mariners vs. Cleveland Guardians on FanDuel today!

Mariners vs Guardians Betting Trends

• The Mariners have been favorites in 90 games this season and have come away with the win 51 times (56.7%) in those contests.
• This year Seattle has won 28 of 44 games when listed as at least -142 on the moneyline.
• The Mariners and their opponents have gone over in 69 of their 130 games with a total set by sportsbooks this season.
• The Mariners are 55-75-0 against the spread in their 130 games with a line set by sportsbooks this season.
• The Guardians have been the underdog on the moneyline 73 total times this season. They've gone 31-42 in those games.
• In games it has played as a moneyline underdog with odds of +120 or longer, Cleveland has a 14-14 record (winning 50% of its games).
• The Guardians have played in 130 games with a set over/under, and have combined with opponents to go over the total 59 times (59-66-5).
• The Guardians have a 68-62-0 record ATS this season.

Mariners Player Leaders

• Cal Raleigh leads Seattle with 120 hits and an OBP of .354 this season. He has a .243 batting average and a slugging percentage of .586.
• Among qualified batters in baseball, his batting average ranks 117th, his on-base percentage ranks 32nd, and he is third in slugging.
• Julio Rodriguez leads Seattle in slugging percentage (.457) thanks to 53 extra-base hits. He's batting .263 with an on-base percentage of .316.
• He is 65th in batting average, 103rd in on-base percentage and 56th in slugging among qualified batters.
• Rodriguez brings a five-game streak with at least one hit into this contest. During his last five outings he is batting .368 with two walks and three RBIs.
• Eugenio Suarez is batting .237 with a .547 slugging percentage and 105 RBI this year.
• Suarez has picked up a hit in three games in a row. During his last five outings he is batting .250 with two home runs, four walks and seven RBIs.
• Josh Naylor has 16 home runs, 73 RBI and a batting average of .286 this season.
• Naylor has safely hit in seven straight games. In his last 10 games he is batting .286 with two doubles, a home run, two walks and four RBIs.

Guardians Player Leaders

• Jose Ramirez has totaled 138 hits with a .359 on-base percentage and a .505 slugging percentage, all club-bests for the Guardians. He's batting .285.
• Including all qualifying hitters, he is 22nd in batting average, while his on-base percentage ranks 26th and he is 17th in slugging.
• Steven Kwan is batting .271 with 22 doubles, a triple, 10 home runs and 45 walks. He's slugging .377 with an on-base percentage of .330.
• Including all qualifying hitters, his batting average places him 42nd, his on-base percentage ranks 77th, and he is 132nd in slugging.
• Kyle Manzardo has 14 doubles, two triples, 22 home runs and 41 walks while hitting .235.
• Angel Martinez has 21 doubles, a triple, 10 home runs and 16 walks while batting .226.

Mariners vs Guardians Head to Head

• 8/29/2025: 5-4 CLE (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -162, Underdog Moneyline: +136)
• 6/15/2025: 6-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -124, Underdog Moneyline: +106)
• 6/14/2025: 4-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 6/13/2025: 7-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 6/20/2024: 6-3 CLE (Favorite: Guardians, Spread: -1.5, Total: 8, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 6/19/2024: 8-0 CLE (Favorite: Guardians, Spread: -1.5, Total: 7.5, Favorite Moneyline: -156, Underdog Moneyline: +132)
• 6/18/2024: 8-5 SEA (Favorite: Guardians, Spread: -1.5, Total: 8.5, Favorite Moneyline: -134, Underdog Moneyline: +114)
• 4/3/2024: 8-0 CLE (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -154, Underdog Moneyline: +130)
• 4/2/2024: 5-2 CLE (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 4/1/2024: 5-4 SEA (Favorite: Guardians, Spread: -1.5, Total: 7.5, Favorite Moneyline: -112, Underdog Moneyline: -104)

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