Mariners vs Orioles Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 13

Odds updated as of 6:12 p.m.

MLB action on Wednesday includes the Seattle Mariners facing the Baltimore Orioles.

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

Mariners vs Orioles Game Info

• Seattle Mariners (67-53) vs. Baltimore Orioles (53-66)
• Date: Wednesday, August 13, 2025
• Time: 6:35 p.m. ET
• Venue: Oriole Park at Camden Yards -- Baltimore, Maryland
• Coverage: MASN and ROOT Sports NW

Mariners vs Orioles Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-142) | BAL: (+120)
• Spread: SEA: -1.5 (+118) | BAL: +1.5 (-142)
• Total: 8.5 -- Over: (-105) | Under: (-115)

Mariners vs Orioles Probable Starting Pitchers

Probable Pitchers: Logan Gilbert (Mariners) - 3-4, 3.35 ERA vs Trevor Rogers (Orioles) - 5-2, 1.44 ERA

The Mariners will give the nod to Logan Gilbert (3-4) against the Orioles and Trevor Rogers (5-2). Gilbert and his team have a record of 5-11-0 against the spread when he starts. Gilbert's team has been victorious in 71.4% of the games he's started as the moneyline favorite with a record of 10-4. The Orioles are 8-2-0 against the spread when Rogers starts. The Orioles are 4-2 in Rogers' six starts this season that they were the moneyline underdog.

Mariners vs Orioles Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (58.1%)

Mariners vs Orioles Moneyline

• Seattle is a -142 favorite on the moneyline, while Baltimore is a +120 underdog at home.

Mariners vs Orioles Spread

• The Orioles are +1.5 on the run line against the Mariners. The Orioles are -142 to cover, and the Mariners are +118.

Mariners vs Orioles Over/Under

• The over/under for Mariners-Orioles on Aug. 13 is 8.5. The over is -105, and the under is -115.

Bet on Seattle Mariners vs. Baltimore Orioles on FanDuel today!

Mariners vs Orioles Betting Trends

• The Mariners have won in 47, or 58%, of the 81 contests they have been named as odds-on favorites in this year.
• Seattle has a record of 25-14 in contests when oddsmakers favor them by -142 or more on the moneyline.
• The Mariners and their opponents have hit the over in 61 of their 117 games with a total set by oddsmakers this season.
• The Mariners have an against the spread mark of 51-66-0 in 117 games with a line this season.
• The Orioles have been the underdog on the moneyline 61 total times this season. They've gone 27-34 in those games.
• Baltimore is 9-15 (winning only 37.5% of its games) when it has played as a moneyline underdog of +120 or longer.
• The Orioles have combined with opponents to hit the over on the total 50 times this season for a 50-63-4 record against the over/under.
• The Orioles have a 52-65-0 record ATS this season (covering 44.4% of the time).

Mariners Player Leaders

• Cal Raleigh has 108 hits, which is tops among Seattle hitters this season, while batting .245 with 61 extra-base hits. He has an on-base percentage of .351 and a slugging percentage of .587.
• Among all qualified hitters in baseball, he ranks 109th in batting average, 41st in on-base percentage, and third in slugging.
• Josh Naylor has 118 hits this season and a team-best OBP of .359. He's batting .291 and slugging .462.
• He is 14th in batting average, 28th in on-base percentage and 49th in slugging in MLB.
• Naylor brings a three-game streak with at least one hit into this contest. During his last five outings he is batting .400 with two doubles, two home runs, a walk and four RBIs.
• Julio Rodriguez has an OPS of .759, fueled by an OBP of .312 and a team-best slugging percentage of .447 this season.
• Rodriguez takes a three-game hitting streak into this matchup. In his last five games he is batting .300 with two home runs, a walk and three RBIs.
• Eugenio Suarez is batting .234 with a .304 OBP and 92 RBI for Seattle this season.

Orioles Player Leaders

• Gunnar Henderson has put up an on-base percentage of .354, a slugging percentage of .468, and has 119 hits, all club-bests for the Orioles (while batting .284).
• He is 23rd in batting average, 36th in on-base percentage and 42nd in slugging percentage among all qualifying hitters in MLB.
• Henderson takes a five-game hitting streak into this game. During his last five outings he is batting .313 with two doubles, a home run, two walks and three RBIs.
• Jackson Holliday has 15 doubles, two triples, 14 home runs and 28 walks while hitting .251. He's slugging .390 with an on-base percentage of .302.
• Including all qualified hitters, he ranks 93rd in batting average, 128th in on-base percentage and 122nd in slugging percentage.
• Adley Rutschman has 16 doubles, a triple, nine home runs and 37 walks while batting .235.
• Jordan Westburg is batting .262 with nine doubles, a triple, 14 home runs and 12 walks.

Mariners vs Orioles Head to Head

• 8/12/2025: 1-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -158, Underdog Moneyline: +134)
• 6/5/2025: 4-3 BAL (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -156, Underdog Moneyline: +132)
• 6/4/2025: 3-2 BAL (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 6/3/2025: 5-1 BAL (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -148, Underdog Moneyline: +126)
• 7/4/2024: 7-3 SEA (Favorite: Orioles, Spread: -1.5, Total: 7, Favorite Moneyline: -144, Underdog Moneyline: +122)
• 7/3/2024: 4-1 BAL (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 7/2/2024: 2-0 BAL (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 5/19/2024: 6-3 BAL (Favorite: Orioles, Spread: -1.5, Total: 7, Favorite Moneyline: -144, Underdog Moneyline: +122)
• 5/17/2024: 9-2 BAL (Favorite: Orioles, Spread: -1.5, Total: 8.5, Favorite Moneyline: -132, Underdog Moneyline: +112)
• 8/13/2023: 5-3 BAL (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -112, Underdog Moneyline: -104)

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