Mariners vs Orioles Prediction, Odds, Moneyline, Spread & Over/Under for June 18

Odds updated as of 12:12 a.m.

On Thursday in MLB, the Seattle Mariners are up against the Baltimore Orioles.

Here's everything you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

Mariners vs Orioles Game Info

• Seattle Mariners (38-36) vs. Baltimore Orioles (34-40)
• Date: Thursday, June 18, 2026
• Time: 4:10 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: Mariners.TV and MASN

Mariners vs Orioles Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-134) | BAL: (+114)
• Spread: SEA: -1.5 (+164) | BAL: +1.5 (-200)
• Total: 7.5 -- Over: (-110) | Under: (-110)

Mariners vs Orioles Probable Starting Pitchers

Probable Pitchers: Bryan Woo (Mariners) - 5-5, 4.28 ERA vs Shane Baz (Orioles) - 4-6, 4.06 ERA

This contest's pitching matchup is set, as the Mariners will send Bryan Woo (5-5) to the mound, while Shane Baz (4-6) will take the ball for the Orioles. Woo's team is 7-7-0 against the spread in his starts this season. Woo's team is 7-7 this season when he starts and they are the moneyline favorite. When Baz starts, the Orioles are 6-8-0 against the spread. The Orioles are 2-6 in Baz's eight 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 (65.3%)

Mariners vs Orioles Moneyline

• Seattle is the favorite, -134 on the moneyline, while Baltimore is a +114 underdog on the road.

Mariners vs Orioles Spread

• The Orioles are +1.5 on the spread (-200 to cover), and Seattle is +164 to cover the runline.

Mariners vs Orioles Over/Under

• Mariners versus Orioles on June 18 has an over/under of 7.5 runs, with the odds on the over -110 and the under set at -110.

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

Mariners vs Orioles Betting Trends

• The Mariners have been victorious in 35, or 53%, of the 66 contests they have been chosen as favorites in this season.
• Seattle has a record of 25-17 in contests when oddsmakers favor them by -134 or more on the moneyline.
• The Mariners and their opponents have hit the over in 35 of their 73 games with a total set by oddsmakers this season.
• In 73 games with a line this season, the Mariners have a mark of 27-46-0 against the spread.
• The Orioles have won 16 of the 37 games they were the underdog on the moneyline this season (43.2%).
• When playing as a moneyline underdog with odds of +114 or longer, Baltimore has a record of 4-10 (28.6%).
• The Orioles have played in 74 games with an over/under set, and have combined with opponents to go over the total 43 times (43-28-3).
• The Orioles have a 35-39-0 record ATS this season (covering 47.3% of the time).

Mariners Player Leaders

• Julio Rodriguez is hitting .248 with 14 doubles, 13 home runs and 25 walks. He has an on-base percentage of .310 and a slugging percentage of .426.
• Among qualifying hitters, he is 90th in batting average, his on-base percentage ranks 117th, and he is 77th in slugging.
• Josh Naylor has eight doubles, eight home runs and 23 walks. He's batting .253 and slugging .372 with an on-base percentage of .315.
• His batting average is 78th among qualified players, his on-base percentage 104th, and his slugging percentage 119th.
• J.P. Crawford is batting .231 with a .410 slugging percentage and 23 RBI this year.
• Crawford brings a three-game hitting streak into this matchup. In his last five games he is hitting .385 with a double, a home run, five walks and an RBI.
• Dominic Canzone is batting .287 with a .357 OBP and 29 RBI for Seattle this season.
• Canzone has hit safely in six games in a row. During his last 10 outings he is batting .400 with two doubles, a triple, three home runs, three walks and six RBIs.

Orioles Player Leaders

• Pete Alonso has accumulated a team-best slugging percentage (.470) and leads the Orioles in hits (70). He's batting .251 and with an on-base percentage of .338.
• Including all the qualifying hitters in MLB, he ranks 82nd in batting average, 76th in on-base percentage and 45th in slugging percentage.
• Taylor Ward leads his team with a .402 on-base percentage. He has a batting average of .257 while slugging .354.
• Including all qualifying players, he is 69th in batting average, fifth in on-base percentage and 132nd in slugging percentage.
• Adley Rutschman is hitting .264 with 15 doubles, a triple, eight home runs and 23 walks.
• Gunnar Henderson has 13 doubles, a triple, 14 home runs and 26 walks while hitting .224.

Mariners vs Orioles Head to Head

• 6/16/2026: 3-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -146, Underdog Moneyline: +124)
• 6/11/2026: 7-5 BAL (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 6/10/2026: 7-2 BAL (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -110, Underdog Moneyline: -106)
• 6/9/2026: 6-5 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -122, Underdog Moneyline: +104)
• 6/8/2026: 6-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 8/14/2025: 5-3 BAL (Favorite: Mariners, Spread: -1.5, Total: 9.5, Favorite Moneyline: -132, Underdog Moneyline: +112)
• 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)

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