Mariners vs Orioles Prediction, Odds, Moneyline, Spread & Over/Under for June 8

Odds updated as of 6:12 p.m.

The MLB's Monday slate includes the Seattle Mariners taking on the Baltimore Orioles.

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 Orioles Game Info

• Seattle Mariners (34-32) vs. Baltimore Orioles (31-35)
• Date: Monday, June 8, 2026
• Time: 6:35 p.m. ET
• Venue: Oriole Park at Camden Yards -- Baltimore, Maryland
• Coverage: MASN and Mariners.TV

Mariners vs Orioles Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-132) | BAL: (+112)
• Spread: SEA: -1.5 (+125) | BAL: +1.5 (-150)
• Total: 9 -- Over: (-115) | Under: (-105)

Mariners vs Orioles Probable Starting Pitchers

Probable Pitchers: Emerson Hancock (Mariners) - 4-2, 2.80 ERA vs Trey Gibson (Orioles) - 1-0, 3.65 ERA

The Mariners will give the ball to Emerson Hancock (4-2, 2.80 ERA), who is eyeing win No. 5 on the season, and the Orioles will turn to Trey Gibson (1-0, 3.65 ERA). When Hancock starts, his team is 4-8-0 against the spread this season. When Hancock starts a game and his team is the favorite on the moneyline, they have a record of 6-4. Gibson has started two games with set spreads, and the Orioles went 1-1-0. The Orioles were the moneyline underdog for two Gibson starts this season -- they split the games.

Mariners vs Orioles Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (62.4%)

Mariners vs Orioles Moneyline

• The moneyline numbers for Mariners vs. Orioles reveal Seattle as the favorite (-132) and Baltimore as the underdog (+112) despite being the home team.

Mariners vs Orioles Spread

• The Mariners are at the Orioles and are favored by 1.5 runs on the spread. The Mariners are +125 to cover the runline, with the Orioles being -150.

Mariners vs Orioles Over/Under

• A total of 9 runs has been set for the Mariners-Orioles game on June 8, with the over available at -115 and the under at -105.

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Mariners vs Orioles Betting Trends

• The Mariners have been chosen as favorites in 60 games this year and have walked away with the win 32 times (53.3%) in those games.
• This season Seattle has been victorious 26 times in 44 chances when named as a favorite of at least -132 on the moneyline.
• Contests with the Mariners have gone over the total set by oddsmakers in 31 of 66 chances this season.
• The Mariners have an against the spread record of 25-41-0 in 66 games with a line this season.
• The Orioles have won 14 of the 32 games they were listed as the moneyline underdog this season (43.8%).
• Baltimore is 5-9 (winning just 35.7% of its games) when it has played as a moneyline underdog of +112 or longer.
• The Orioles have played in 66 games with a set over/under, and have combined with their opponents to go over the total 39 times (39-26-1).
• The Orioles have gone 31-35-0 ATS this season.

Mariners Player Leaders

• Randy Arozarena has an OPS of .818, fueled by an OBP of .376 to go with a slugging percentage of .442. He has a .285 batting average, as well.
• Among qualified hitters in MLB, he ranks 27th in batting average, 22nd in on-base percentage, and 63rd in slugging.
• Arozarena hopes to build on a three-game hitting streak in this matchup. In his last five games he is batting .278 with two doubles, four walks and three RBIs.
• Julio Rodriguez leads Seattle in slugging percentage (.457) and total hits (69) this season. He's batting .258 with an on-base percentage of .316.
• Among all qualifying players, he is 65th in batting average, 110th in on-base percentage and 48th in slugging percentage.
• Rodriguez heads into this matchup looking to extend his three-game hit streak. In his last five games he is hitting .250 with a double, a home run, three walks and two RBIs.
• Josh Naylor has collected 62 base hits, an OBP of .321 and a slugging percentage of .361 this season.
• Naylor heads into this matchup with three games in a row with at least one hit. In his last five games he is batting .300 with two doubles, a home run, a walk and two RBIs.
• Cole Young is batting .253 with a .324 OBP and 31 RBI for Seattle this season.
• Young enters this matchup on a 10-game hitting streak. During his last 10 outings he is hitting .333 with a home run, two walks and four RBIs.

Orioles Player Leaders

• Pete Alonso has a .446 slugging percentage, which paces the Orioles. He's batting .243 with an on-base percentage of .324.
• Including all the qualified hitters in MLB, he ranks 95th in batting average, 98th in on-base percentage and 57th in slugging percentage.
• Adley Rutschman has racked up 48 hits to lead his team. He has a batting average of .267 while slugging .489 with an on-base percentage of .343.
• He is currently 53rd in batting average, 65th in on-base percentage and 31st in slugging percentage among all qualifying hitters.
• Taylor Ward has racked up a team-high OBP (.396) and slugging percentage (.360).
• Gunnar Henderson's .418 slugging percentage leads his team.

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