• The Mariners are -155 favorites vs the Nationals
• Mariners vs Nationals Over / Under today: 9 Runs
• Mariners / Nationals TV Channel: MRTV | NATV

The Seattle Mariners (-155) visit Nationals Park to take on the Washington Nationals (+125) on June 12, 2026. First pitch is scheduled for 6:45 pm in Washington, DC.

This season, the Mariners are against the spread (ATS), while the Nationals are ATS.

Mariners vs Nationals Starting Pitchers Today:

• Mariners starting pitcher: Bryce Miller 2-0, 1.33 ERA
• Nationals starting pitcher: Zack Littell 6-4, 4.79 ERA

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

Mariners vs Nationals Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Friday‘s MLB game with 59.2% confidence, factoring in game simulations, recent player performances, starting pitchers and injuries.

Bet now on Mariners vs Nationals and all games with BetMGM

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

Best Mariners Player Prop Bets Today:

• Colt Emerson has hit the Home Runs Over in 3 of his last 9 games (+20.00 Units / 222% ROI)
• Cole Young has hit the Hits Over in 16 of his last 20 games (+9.80 Units / 27% ROI)
• Cole Young has hit the Singles Over in 12 of his last 15 games (+9.70 Units / 58% ROI)
• Cole Young has hit the Runs Under in 15 of his last 20 away games (+6.90 Units / 19% ROI)
• Cole Young has hit the Total Bases Under in 13 of his last 20 away games (+5.30 Units / 20% ROI)

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

Best Nationals Player Prop Best Bets Today:

• Jacob Young has hit the Home Runs Over in 4 of his last 10 games at home (+43.00 Units / 430% ROI)
• Luis Garcia has hit the Hits Under in 14 of his last 20 games at home (+13.97 Units / 52% ROI)
• Luis Garcia has hit the Runs Under in 17 of his last 20 games at home (+12.10 Units / 35% ROI)
• Luis Garcia has hit the Total Bases Under in 15 of his last 20 games at home (+7.19 Units / 23% ROI)
• Luis Garcia has hit the Singles Under in 7 of his last 8 games (+6.15 Units / 73% ROI)

Mariners Best Bets Today:

• The Seattle Mariners have covered the Run Line in 13 of their last 22 away games (+7.75 Units / 33% ROI)
• The Seattle Mariners have hit the Team Total Under in 25 of their last 40 away games (+6.95 Units / 15% ROI)
• The Seattle Mariners have covered the 1st Five Innings (F5) Run Line in 12 of their last 18 away games (+6.15 Units / 31% ROI)
• The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 10 of their last 16 games (+5.95 Units / 28% ROI)
• The Seattle Mariners have hit the Moneyline in 11 of their last 16 games (+5.15 Units / 26% ROI)

Nationals Best Bets Today:

• The Washington Nationals have covered the 1st Five Innings (F5) Run Line in 36 of their last 50 games (+19.90 Units / 33% ROI)
• The Washington Nationals have hit the 1st Five Innings (F5) Moneyline in 28 of their last 50 games (+15.50 Units / 29% ROI)
• The Washington Nationals have hit the Game Total Over in 26 of their last 40 games at home (+13.10 Units / 30% ROI)
• The Washington Nationals have hit the 1st Five Innings (F5) Team Total Over in 32 of their last 50 games (+11.20 Units / 18% ROI)
• The Washington Nationals have covered the Run Line in 24 of their last 35 games (+9.25 Units / 18% ROI)

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are against the Run Line ( Units / ROI).

• away moneyline record when betting on the Moneyline for ML units Units / ML ROI ROI
• away total over record when betting on the total runs Over for over units Units / over ROI ROI
• away total under record when betting on the total runs Under for under units Units / under ROI ROI

Nationals Against the Spread (ATS) Record

Against the spread this season, the Nationals are against the Run Line ( Units / ROI).

• home moneyline record when betting on the Moneyline for ML units Units / ML ROI ROI
• home total over record when betting on the total runs Over for over units Units / over ROI ROI
• home total under record when betting on the total runs Under for under units Units / under ROI ROI

Nationals vs Mariners Home Run Prop Bets Today

Nationals vs Mariners Total Hits Prop Bets Today

Nationals vs Mariners Strikeout Prop Bets Today

Mariners Keys to the Game vs. the Nationals

The Mariners are 13-6 (.684) vs top 10 scoring offenses this season Today, they face the Nationals (first in runs scored).

The Mariners are 23-9 (.719) vs the bottom 10 runs allowed teams this season Today, they face the Nationals (29th runs allowed).

The Mariners are 20-5 (.800) when they’ve hit 2 or more home runs this season — tied for 5th best in MLB; League Avg: .703.

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

Nationals Keys to the Game vs. the Mariners

The Nationals are just 12-20 (.375) at home this season — 2nd lowest in MLB; League Avg: .528.

The Nationals are just 26-7 (.788) when leading entering the 7th inning this season — 5th lowest in MLB; League Avg: .855.

The Nationals are 6-3 (.667) when tied entering the 8th inning this season — tied for 4th best in MLB; League Avg: .500.

The Nationals are just 1-27 (.036) when trailing entering the 8th inning this season — 5th lowest in MLB; League Avg: .110.

Mariners Hitting Stats & Trends

Mariners hitters have an OPS of just .625 (773 PA’s) against LHP this season — lowest in MLB.

Mariners hitters are slugging just .336 against LHP this season — lowest in MLB.

The Mariners are batting just .211 against LHP this season — lowest in MLB.

Mariners hitters have an OBP of just .290 (773 PA’s) against LHP this season — 3rd lowest in MLB.

Nationals Hitting Stats & Trends

Nationals hitters have an OBP of just .272 (320 PA’s) when facing the starting pitcher for the 3rd time in a game this season — lowest in MLB.

The Nationals have scored 1.99 runs per game (137/69) in late innings this season — best in MLB.

The Nationals are batting just .197 when facing the starting pitcher for the 3rd time in a game this season — lowest in MLB.

The Nationals are batting .269 against LHP this season — 2nd best in MLB.

Mariners Pitching Stats & Trends

Mariners pitchers have a first-pitch strike rate of 66% this season — highest in MLB.

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

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

Nationals Pitching Stats & Trends

Nationals pitchers have a strikeout rate of just 38% with two-strikes this season — tied for lowest in MLB.

Opponents have a miss rate of just 22% against Nationals pitchers this season — lowest in MLB.

The Nationals have allowed 6.12 runs per game (196/32) at home this season — 3rd highest in MLB.

Nationals pitchers have an ERA of 5.25 (295.0 IP) at home this season — 3rd highest in MLB.

More MLB Reading:

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

Bet now on Mariners vs Nationals 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.