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

Odds updated as of 4:17 a.m.

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

We've got you covered, in terms of the vital info about 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 (+114) | BAL: +1.5 (-137)
• Total: 8.5 -- Over: (-114) | Under: (-106)

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 ball to Logan Gilbert (3-4, 3.35 ERA), who is eyeing win No. 4 on the season, and the Orioles will counter with Trevor Rogers (5-2, 1.44 ERA). Gilbert's team is 5-11-0 against the spread in his starts this season. When Gilbert starts a game and his team is the favorite on the moneyline, they have a record of 10-4. The Orioles are 8-2-0 against the spread when Rogers starts. The Orioles have a 4-2 record in Rogers' six starts this season when they were the underdog on the moneyline.

Mariners vs Orioles Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (57.4%)

Mariners vs Orioles Moneyline

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

Mariners vs Orioles Spread

• The Mariners are at the Orioles and are favored by 1.5 runs on the spread. The Mariners are +114 to cover the runline, with the Orioles being -137.

Mariners vs Orioles Over/Under

• A combined run total of 8.5 has been set for Mariners-Orioles on Aug. 13, with the over at -114 and the under at -106.

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.
• This season Seattle has come away with a win 25 times in 39 chances when named as a favorite of at least -142 on the moneyline.
• Contests with the Mariners have gone over the total set by sportsbooks in 61 of 117 chances this season.
• The Mariners are 51-66-0 against the spread in their 117 games that had a posted line this season.
• The Orioles have been the underdog on the moneyline 61 total times this season. They've finished 27-34 in those games.
• Baltimore has a record of 9-15 when playing as a moneyline underdog with odds of +120 or longer (37.5%).
• The Orioles have played in 117 games with a set over/under, and have combined with their opponents to go over the total 50 times (50-63-4).
• The Orioles have gone 52-65-0 ATS this season.

Mariners Player Leaders

• Cal Raleigh leads Seattle in total hits (108) 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 batters in the majors, his batting average ranks 109th, his on-base percentage ranks 42nd, and he is third in slugging.
• Josh Naylor has 118 hits this season and a team-best OBP of .359. He's batting .291 and slugging .462.
• Among qualified hitters, his batting average ranks him 14th, his on-base percentage 28th, and his slugging percentage 49th.
• Naylor takes a three-game streak with at least one hit into this matchup. During his last five outings he is hitting .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 has recorded at least one base hit in three straight games. 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-highs for the Orioles (while batting .284).
• Including all the qualifying players in the big leagues, his batting average ranks 23rd, his on-base percentage is 36th, and he is 42nd in slugging.
• Henderson enters this game on a five-game hitting streak. In his last five games he is batting .313 with two doubles, a home run, two walks and three RBIs.
• Jackson Holliday is batting .251 with 15 doubles, two triples, 14 home runs and 28 walks. He's slugging .390 with an on-base percentage of .302.
• Including all qualified hitters, he is 93rd in batting average, 129th in on-base percentage and 122nd in slugging percentage.
• Adley Rutschman is hitting .235 with 16 doubles, a triple, nine home runs and 37 walks.
• Jordan Westburg is hitting .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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