• The Mariners are -135 favorites vs the Red Sox
• Red Sox vs Mariners Over / Under today: 6.5 Runs
• Red Sox / Mariners TV Channel: NESN | MRTV | KING

The Boston Red Sox (+115) visit T-Mobile Park to take on the Seattle Mariners (-135) on June 19, 2026. First pitch is scheduled for 10:10 pm in Seattle, WA.

This season, the Red Sox are 29-43 against the spread (ATS), while the Mariners are 30-46 ATS.

Red Sox vs Mariners Starting Pitchers Today:

• Red Sox starting pitcher: Ranger Suarez 2-3, 3.28 ERA
• Mariners starting pitcher: Bryce Miller 3-0, 1.54 ERA

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

Red Sox vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Friday‘s MLB game with 55.3% confidence, factoring in game simulations, recent player performances, starting pitchers and injuries.

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

Best Red Sox Player Prop Bets Today:

• Jarren Duran has hit the Home Runs Over in 4 of his last 10 away games (+19.40 Units / 194% ROI)
• Mickey Gasper has hit the Singles Over in 17 of his last 25 games (+10.30 Units / 40% ROI)
• Ceddanne Rafaela has hit the Total Bases Over in 15 of his last 25 games (+9.15 Units / 34% ROI)
• Carlos Narvaez has hit the Runs Over in 6 of his last 8 away games (+8.95 Units / 112% ROI)
• Mickey Gasper has hit the Hits Over in 19 of his last 25 games (+8.95 Units / 20% ROI)

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

Best Mariners Player Prop Best Bets Today:

• Bryce Miller has hit the Hits Allowed Over in 5 of his last 7 games at home (+3.70 Units / 51% ROI)
• Bryce Miller has hit the Strikeouts Over in 5 of his last 7 games at home (+3.00 Units / 39% ROI)
• Bryce Miller has hit the Earned Runs Under in 3 of his last 4 games at home (+1.40 Units / 26% ROI)
• Bryce Miller has hit the Pitching Outs Over in 3 of his last 4 games at home (+1.05 Units / 17% ROI)
• Bryce Miller has hit the Walks Allowed Over in 3 of his last 5 games at home (+1.00 Units / 14% ROI)

Red Sox Best Bets Today:

• The Boston Red Sox have hit the Team Total Under in 31 of their last 50 games (+9.80 Units / 17% ROI)
• The Boston Red Sox have hit the 1st Five Innings (F5) Team Total Under in 24 of their last 40 games (+6.10 Units / 13% ROI)
• The Boston Red Sox have covered the Run Line in 13 of their last 22 away games (+5.75 Units / 18% ROI)
• The Boston Red Sox have hit the Game Total Under in 27 of their last 50 games (+4.75 Units / 9% ROI)
• The Boston Red Sox have hit the Moneyline in 13 of their last 22 away games (+4.45 Units / 19% ROI)

Mariners Best Bets Today:

• The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Under in 13 of their last 19 games at home (+6.80 Units / 29% ROI)
• The Seattle Mariners have hit the Team Total Under in 13 of their last 20 games at home (+6.50 Units / 31% ROI)
• The Seattle Mariners have hit the Game Total Over in 10 of their last 15 games (+5.85 Units / 36% ROI)
• The Seattle Mariners have hit the Moneyline in 8 of their last 10 games at home (+5.30 Units / 38% ROI)
• The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 21 of their last 40 games (+4.30 Units / 8% ROI)

Red Sox Against the Spread (ATS) Record

Against the spread this season, the Red Sox are 29-41 against the Run Line (-12.85 Units / -14.21% ROI).

• 29-43 when betting on the Moneyline for -22.85 Units / -25.97% ROI
• 32-37 when betting on the total runs Over for -8.85 Units / -11.18% ROI
• 37-32 when betting on the total runs Under for +1.45 Units / 1.83% ROI

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 30-46 against the Run Line (-7.85 Units / -9.83% ROI).

• 39-37 when betting on the Moneyline for -9.75 Units / -9.4% ROI
• 37-36 when betting on the total runs Over for -2.3 Units / -2.75% ROI
• 36-37 when betting on the total runs Under for -4.6 Units / -5.5% ROI

Mariners vs Red Sox Home Run Prop Bets Today

Mariners vs Red Sox Total Hits Prop Bets Today

Mariners vs Red Sox Strikeout Prop Bets Today

Red Sox Keys to the Game vs. the Mariners

The Red Sox are just 0-39 (.000) when trailing entering the 9th inning this season — tied for lowest in MLB; League Avg: .054.

The Red Sox are just 2-23 (.080) when allowing 5 or more runs this season — lowest in MLB; League Avg: .205.

The Red Sox are just 29-43 (.403) this season — 3rd lowest in MLB; League Avg: .500.

The Red Sox are just 1-6 (.143) when tied entering the 8th inning this season — 2nd lowest in MLB; League Avg: .500.

Mariners Keys to the Game vs. the Red Sox

The Mariners are just 6-17 (.261) vs bottom 10 scoring offenses this season Today, they face the Red Sox (29th in runs scored).

The Mariners are just 5-13 (.278) vs the top 10 runs allowed teams this season Today, they face Red Sox (ninth in runs allowed).

The Mariners are 45-36 (.556) vs the top 10 runs allowed teams since the 2025 season Today, they face Red Sox (ninth in runs allowed).

The Mariners are 26-15 (.634) when tied entering the 7th inning since the 2025 season — 2nd best in MLB; League Avg: .500.

Red Sox Hitting Stats & Trends

The Red Sox are batting .266 against LHP this season — 3rd best in MLB.

The Red Sox are batting .184 on pitches out of the zone this season — 3rd best in MLB.

Red Sox hitters are slugging just .487 in non-two strike counts this season — lowest in MLB.

Red Sox hitters have an OBP of .332 (651 PA’s) against LHP this season — 4th best in MLB.

Mariners Hitting Stats & Trends

The Mariners are just 5-18 (.217) against the run line (-49.1% ROI) vs bottom 10 scoring offenses this season Today, they face the Red Sox (29th in runs scored).

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

The Mariners are batting just .216 against LHP this season — tied for lowest in MLB.

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

Red Sox Pitching Stats & Trends

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

Red Sox pitchers have walked 8% of batters this season — 5th best in MLB.

The Red Sox have allowed 0.92 runs per game (66/72) in late innings this season — 2nd best in MLB.

Red Sox pitchers have induced opposing hitters to ground into just 36 double plays in 497 opportunities (7%) this season — 2nd lowest 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 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 — 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

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