• The Mariners are -145 favorites vs the Orioles
• Orioles vs Mariners Over / Under today: 7.5 Runs
• Orioles / Mariners TV Channel: MASN | MRTV

The Baltimore Orioles (+120) visit T-Mobile Park to take on the Seattle Mariners (-145) on June 17, 2026. First pitch is scheduled for 9:40 pm in Seattle, WA.

This season, the Orioles are 34-40 against the spread (ATS), while the Mariners are 29-45 ATS.

Orioles vs Mariners Starting Pitchers Today:

• Orioles starting pitcher: Kyle Bradish 3-7, 4.32 ERA
• Mariners starting pitcher: George Kirby 5-6, 4.06 ERA

Orioles vs. Mariners Odds, Run Line, Over/Under & Moneyline

Orioles vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Wednesday‘s MLB game with 56.2% confidence, factoring in game simulations, recent player performances, starting pitchers and injuries.

Bet now on Orioles vs Mariners and all games with BetMGM

We’ve highlighted some favorite MLB player prop bets for Orioles players for Wednesday‘s game, looking at profitable historical betting trends:

Best Orioles Player Prop Bets Today:

• Colton Cowser has hit the Home Runs Over in 3 of his last 7 away games (+15.50 Units / 221% ROI)
• Kyle Bradish has hit the Walks Allowed Over in 15 of his last 20 games (+11.15 Units / 42% ROI)
• Adley Rutschman has hit the Walks Over in 12 of his last 20 games (+10.95 Units / 55% ROI)
• Gunnar Henderson has hit the RBIs Under in 17 of his last 20 away games (+10.50 Units / 22% ROI)
• Taylor Ward has hit the Runs Over in 14 of his last 20 away games (+9.25 Units / 44% ROI)

And here are some favorite MLB player prop bets for Mariners players for Wednesday‘s game, looking at profitable historical betting trends:

Best Mariners Player Prop Best Bets Today:

• Colt Emerson has hit the Home Runs Over in 3 of his last 10 games at home (+19.00 Units / 190% ROI)
• Cole Young has hit the Runs Under in 18 of his last 20 games at home (+13.85 Units / 31% ROI)
• Cole Young has hit the Singles Over in 15 of his last 20 games (+10.70 Units / 46% ROI)
• Julio Rodriguez has hit the Hits Under in 15 of his last 20 games (+9.95 Units / 28% ROI)
• Rob Refsnyder has hit the Total Bases Under in 17 of his last 25 games (+9.90 Units / 35% ROI)

Orioles Best Bets Today:

• The Baltimore Orioles have hit the 1st Five Innings (F5) Team Total Under in 22 of their last 35 games (+9.30 Units / 24% ROI)
• The Baltimore Orioles have hit the Game Total Over in 16 of their last 24 away games (+8.30 Units / 31% ROI)
• The Baltimore Orioles have hit the Team Total Over in 15 of their last 22 games (+7.25 Units / 27% ROI)
• The Baltimore Orioles have covered the Run Line in 14 of their last 24 games (+3.70 Units / 11% ROI)
• The Baltimore Orioles have covered the 1st Five Innings (F5) Run Line in 4 of their last 6 games (+1.85 Units / 25% ROI)

Mariners Best Bets Today:

• The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Under in 12 of their last 17 games at home (+7.20 Units / 34% ROI)
• The Seattle Mariners have hit the Game Total Over in 9 of their last 13 games (+5.95 Units / 42% ROI)
• The Seattle Mariners have hit the Moneyline in 7 of their last 8 games at home (+5.60 Units / 49% ROI)
• The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 11 of their last 20 games (+4.60 Units / 17% ROI)
• The Seattle Mariners have hit the Team Total Under in 11 of their last 18 games at home (+4.35 Units / 23% ROI)

Orioles Against the Spread (ATS) Record

Against the spread this season, the Orioles are 35-39 against the Run Line (-6.35 Units / -6.57% ROI).

• 34-40 when betting on the Moneyline for -10.35 Units / -12.01% ROI
• 42-29 when betting on the total runs Over for +10 Units / 12.23% ROI
• 29-42 when betting on the total runs Under for -16.95 Units / -20.9% ROI

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 29-45 against the Run Line (-8.5 Units / -10.92% ROI).

• 38-36 when betting on the Moneyline for -9.45 Units / -9.34% ROI
• 36-35 when betting on the total runs Over for -2.2 Units / -2.7% ROI
• 35-36 when betting on the total runs Under for -4.5 Units / -5.52% ROI

Mariners vs Orioles Home Run Prop Bets Today

Mariners vs Orioles Total Hits Prop Bets Today

Mariners vs Orioles Strikeout Prop Bets Today

Orioles Keys to the Game vs. the Mariners

The Orioles are just 6-32 (.158) when scoring 4 or fewer runs this season — 2nd lowest in MLB; League Avg: .272.

The Orioles are just 12-20 (.375) on the road this season — 5th lowest in MLB; League Avg: .468.

The Orioles are just 17-66 (.205) when allowing 2 or more home runs since the 2025 season — 4th lowest in MLB; League Avg: .300.

The Orioles are just 6-11 (.353) when tied entering the 8th inning since the 2025 season — 3rd lowest in MLB; League Avg: .500.

Mariners Keys to the Game vs. the Orioles

The Mariners are 14-8 (.636) vs top 10 scoring offenses this season Today, they face the Orioles (eighth in runs scored).

The Mariners are 21-5 (.808) when they’ve hit 2 or more home runs this season — 5th best in MLB; League Avg: .704.

The Mariners are 24-11 (.686) vs the bottom 10 runs allowed teams this season Today, they face the Orioles (26th runs allowed).

The Mariners are 25-15 (.625) when tied entering the 7th inning since the 2025 season — tied for 2nd best in MLB; League Avg: .500.

Orioles Hitting Stats & Trends

Orioles hitters are slugging just .452 on the first pitch of at-bats this season — lowest in MLB.

The Orioles are batting just .155 with two-strikes this season — tied for 3rd lowest in MLB.

Orioles hitters have an OPS of just .667 (781 PA’s) against LHP this season — 5th lowest in MLB.

The Orioles are batting just .136 on pitches out of the zone this season — tied for 4th lowest in MLB.

Mariners Hitting Stats & Trends

Mariners hitters are slugging just .340 against LHP this season — lowest in MLB.

Mariners hitters have an OPS of just .636 (794 PA’s) against LHP this season — lowest in MLB.

The Mariners are batting just .216 against LHP this season — 2nd lowest in MLB.

Mariners hitters have 40 extra-base hits out of 150 total hits (just 27%) against LHP this season — 2nd lowest in MLB.

Orioles Pitching Stats & Trends

The Orioles have allowed 5.67 runs per game (187/33) on the road this season — 2nd highest in MLB.

Orioles pitchers have a strikeout rate of just 20% this season — 4th lowest in MLB.

The longest HR allowed by the Orioles pitchers this season traveled 443.2 feet — — 3rd shortest in MLB

Orioles pitchers have an ERA of 5.46 (280.1 IP) on the road this season — 3rd highest in MLB.

Mariners Pitching Stats & Trends

Mariners pitchers have a first-pitch strike rate of 67% this season — highest in MLB.

Mariners pitchers have walked 7% of batters this season — best in MLB.

Mariners pitchers have walked 6% of batters when facing the leadoff batter in the inning this season — 2nd best in MLB.

Mariners pitchers have thrown at least two strikes in their first three pitches to 69% of opposing batters this season — highest in MLB.

More MLB Reading:

• Home Run Predictions Today
• Best NRFI Bets Today
• Strikeout Props Today
• MLB Starting Pitchers Today

Bet now on Orioles vs Mariners and all games with BetMGM

Bet on MLB Odds at BetMGM

Sportsbook promos are always available at BetMGM. For new customers, check out the sportsbook welcome offer and BetMGM Refer a Friend. For existing customers, there are Odds Boosts, Parlay Boosts, contests and more.