Mariners vs Red Sox Prediction, Odds & Player Prop Bets Today – MLB, Apr 23

(AP Photo/Michael Dwyer)
  • The Red Sox are -140 favorites vs the Mariners
  • Mariners vs Red Sox Over / Under today: 10 Runs
  • Mariners / Red Sox TV Channel: RTNW | NESN

The Seattle Mariners (+118) visit Fenway Park to take on the Boston Red Sox (-140) on Wednesday, April 23, 2025. First pitch is scheduled for 6:45pm EDT in Boston, MA, MA.

This season, the Mariners are 12-11 against the spread (ATS), while the Red Sox are 13-12 ATS.

Mariners vs Red Sox Starting Pitchers Today:

  • Mariners starting pitcher: Emerson Hancock 0-1, 12.72 ERA
  • Red Sox starting pitcher: Sean Newcomb 0-2, 3.57 ERA

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

SpreadOver / UnderMoneyline
Mariners+1.5 -180O 10 -102+118
Red Sox -1.5 +145U 10 -118-140

Mariners vs Red Sox Prediction for Today’s Game

Based on recent trends the model predicts the Red Sox will win Wednesday‘s MLB game with 54.6% 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 Mariners players for Wednesday‘s game, looking at profitable historical betting trends:

Best Mariners Player Prop Bets Today:

  • Cal Raleigh has hit the Home Runs Over in 6 of his last 10 games (+17.35 Units / 174% ROI)
  • Cal Raleigh has hit the Hits Over in 18 of his last 20 away games (+14.75 Units / 40% ROI)
  • Dylan Moore has hit the Runs Over in 12 of his last 15 away games (+14.30 Units / 92% ROI)
  • J.P. Crawford has hit the Singles Over in 14 of his last 20 away games (+12.65 Units / 62% ROI)
  • Cal Raleigh has hit the Total Bases Over in 15 of his last 20 away games (+12.15 Units / 56% ROI)

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

Best Red Sox Player Prop Best Bets Today:

  • Triston Casas has hit the Runs Under in 17 of his last 20 games (+11.30 Units / 29% ROI)
  • Trevor Story has hit the Singles Over in 15 of his last 20 games (+10.35 Units / 48% ROI)
  • Rafael Devers has hit the Hits Under in 13 of his last 25 games (+8.05 Units / 32% ROI)
  • Alex Bregman has hit the Total Bases Under in 8 of his last 9 games at home (+6.65 Units / 51% ROI)
  • Rafael Devers has hit the RBIs Under in 12 of his last 15 games (+6.40 Units / 20% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Over in 12 of their last 17 games (+6.35 Units / 29% ROI)
  • The Seattle Mariners have covered the Run Line in 8 of their last 11 games (+6.30 Units / 44% ROI)
  • The Seattle Mariners have hit the Moneyline in 8 of their last 11 games (+5.30 Units / 43% ROI)
  • The Seattle Mariners have hit the Team Total Over in 11 of their last 17 games (+4.80 Units / 25% ROI)
  • The Seattle Mariners have hit the Game Total Over in 8 of their last 11 games (+4.55 Units / 37% ROI)
  • The Boston Red Sox have hit the 1st Five Innings (F5) Moneyline in 13 of their last 20 games (+9.35 Units / 29% ROI)
  • The Boston Red Sox have hit the Team Total Under in 12 of their last 15 games (+8.00 Units / 41% ROI)
  • The Boston Red Sox have covered the 1st Five Innings (F5) Run Line in their last 7 games (+7.05 Units / 77% ROI)
  • The Boston Red Sox have hit the Moneyline in 6 of their last 7 games (+3.45 Units / 24% ROI)
  • The Boston Red Sox have hit the Game Total Under in 14 of their last 25 games (+3.05 Units / 11% ROI)

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 12-11 against the Run Line (+1.6 Units / 5.36% ROI).

  • 12-11 when betting on the Moneyline for -1.05 Units / -3.63% ROI
  • 11-10 when betting on the total runs Over for -0.15 Units / -0.59% ROI
  • 10-11 when betting on the total runs Under for -2.2 Units / -8.68% ROI

Red Sox Against the Spread (ATS) Record

Against the spread this season, the Red Sox are 13-12 against the Run Line (+0.9 Units / 2.77% ROI).

  • 14-11 when betting on the Moneyline for -1.7 Units / -4.39% ROI
  • 10-14 when betting on the total runs Over for -5.15 Units / -18.86% ROI
  • 14-10 when betting on the total runs Under for +3.05 Units / 11.01% ROI

Red Sox vs Mariners Home Run Prop Bets Today

Over Under
Wilyer Abreu (BOS) 0.5 +340 0.5 -450
Rafael Devers (BOS) 0.5 +360 0.5 -500
Cal Raleigh (SEA) 0.5 +360 0.5 -500
Alex Bregman (BOS) 0.5 +450 0.5 -650
Randy Arozarena (SEA) 0.5 +500 0.5 -700

Red Sox vs Mariners Total Hits Prop Bets Today

Over Under
Rafael Devers (BOS) 0.5 -250 0.5 +180
Trevor Story (BOS) 0.5 -250 0.5 +190
Wilyer Abreu (BOS) 0.5 -235 0.5 +175
Dylan Moore (SEA) 0.5 -235 0.5 +180
Cal Raleigh (SEA) 0.5 -235 0.5 +180

Red Sox vs Mariners RBI Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +110 0.5 -145
Alex Bregman (BOS) 0.5 +115 0.5 -155
Wilyer Abreu (BOS) 0.5 +120 0.5 -160
Rafael Devers (BOS) 0.5 +135 0.5 -175
Randy Arozarena (SEA) 0.5 +140 0.5 -185

Red Sox vs Mariners Strikeout Prop Bets Today

Over Under
Emerson Hancock (SEA) 3.5 -115 3.5 -110
Sean Newcomb (BOS) 4.5 +100 4.5 -135

Emerson Hancock has allowed at least one HR in each of his last five games dating back to September 13rd, 2024 — tied with Zack Wheeler for the longest active streak among active MLB players.

Red Sox Starting Pitcher Stats & Trends

Sean Newcomb has allowed a BABIP of .471 this season — highest in MLB among starting pitchers with at least 8 total IP; League Avg: .284 — 0 Percentile.

Sean Newcomb has allowed an OBP of .375 (40 PA’s) with two-strikes this season — 3rd highest in MLB among starting pitchers with at least 8 total IP; League Avg: .247 — second Percentile.

Sean Newcomb has allowed a BABIP of .488 against right-handed batters this season — 3rd highest in MLB among starting pitchers with at least 8 total IP; League Avg: .284 — second Percentile.

Opponents are hitting .387 (12-for-31) against Sean Newcomb when going through the lineup the first time in a game this season — tied for 2nd highest in MLB among starting pitchers with at least 8 total IP; League Avg: .237 — second Percentile.

Mariners Keys to the Game vs. the Red Sox

The Mariners are 2-9 (.182) when trailing entering the 9th inning this season — best in MLB; League Avg: .035.

The Mariners are 158-3 (.981) when leading entering the 9th inning since the 2023 season — 2nd best in MLB; League Avg: .950.

The Mariners were 58-5 (.921) when they scored 5 or more runs in the 2024 season — best in MLB; League Avg: .804.

The Mariners were 72-1 (.986) when leading entering the 9th inning in the 2024 season — tied for 2nd best in MLB; League Avg: .949.

Red Sox Keys to the Game vs. the Mariners

The Red Sox were just 5-58 (.079) when trailing entering the 7th inning in the 2024 season — 3rd lowest in MLB; League Avg: .143.

The Red Sox are 55-11 (.833) when they’ve had 10 or more hits since last season — 4th best in MLB; League Avg: .749.

The Red Sox are 5-1 (.833) vs top 10 scoring offenses this season They play the Mariners (21st best runs scored) today.

The Red Sox are 8-5 (.615) after a win this season — tied for 4th best in MLB; League Avg: .481.

The Mariners are batting just .187 at home this season — lowest in MLB; League Avg: .251.

The Mariners are batting just .208 when facing the starting pitcher for the 3rd time in a game since last season — lowest in MLB; League Avg: .261.

The Mariners are batting just .222 at home since the 2023 season — lowest in MLB; League Avg: .248.

Mariners hitters struck out 1,172 times in 4,293 PA’s (27%) against RHP in the 2024 season — highest in MLB; League Avg: 23%.

Red Sox hitters struck out 506 times in 1,816 PA’s (28%) against LHP in the 2024 season — highest in MLB; League Avg: 23%.

Red Sox hitters have drawn walks in 13% of its PA’s against LHP this season — best in MLB; League Avg: 9%.

The Red Sox batted .300 when facing the starting pitcher for the 3rd time in a game in 2023 — 2nd best in MLB; League Avg: .267.

Red Sox hitters have struck out in 28% of it’s PA’s against LHP since last season — 2nd highest in MLB; League Avg: 23%.

Mariners pitchers walked 76 of 1,441 batters (5%) when facing the leadoff batter in the inning in the 2024 season — best in MLB; League Avg: 7%.

Mariners pitchers allowed an OBP of just .251 (1,441 PA’s) when facing the leadoff batter in the inning in the 2024 season — best in MLB; League Avg: .305.

Mariners pitchers walked 369 of 5,801 batters (6%) in the 2024 season — best in MLB; League Avg: 8%.

Mariners pitchers have walked 6% of batters when facing the leadoff batter in the inning since last season — best in MLB; League Avg: 8%.

Red Sox pitchers have walked 7% of batters when facing the leadoff batter in the inning since last season — 5th best in MLB; League Avg: 8%.

Opponents had a miss rate of just 24% against Red Sox pitchers in the 2024 season — tied for 2nd lowest in MLB; League Avg: 25%.

Red Sox pitchers walked 98 of 1,456 batters (7%) when facing the leadoff batter in the inning in the 2024 season — tied for 5th best in MLB; League Avg: 7%.

Opponents have a groundball rate of 47% against Red Sox pitchers this season — 5th highest in MLB; League Avg: 43%.

More MLB Reading:


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Our BetMGM betting authors are experts who focus on individual game matchups & player prop bets with an emphasis on betting odds, lines & predictions.

Our BetMGM betting authors are experts who focus on individual game matchups & player prop bets with an emphasis on betting odds, lines & predictions.