Red Sox vs Mariners Prediction 8/31/26 MLB Picks Today

In this article we will formulate a Red Sox vs Mariners prediction for this MLB game on Monday, August 31st at Fenway Park in Boston, Massachusetts. Let’s take a look at the prediction for this MLB matchup. 

Boston Red Sox Betting Preview

The Boston Red Sox are 74-63 this year after they lost three out of four against the Yankees by scores of 0-1, 6-0, 2-9, and 1-16. In game four, Boston allowed the first seven runs in the game and never had a chance after a badly missed call by the umpires in the middle innings. The Red Sox recorded seven hits in the game and they were led by Sogard, who went 1-3 with one RBI. Suarez allowed nine hits and six earned runs over 5.1 innings for the loss, while Moran allowed five earned runs in relief. Prior to that series, Boston won two out of three against the Marlins and all three against the Giants. 

This season, Boston has a 3.57 ERA with a 1.23 WHIP and a .241 opponent batting average, while they have scored 609 runs with a .249 batting average and a .323 on base percentage. Willson Contreras has led the Red Sox with 26 home runs and 79 RBIs, while Jarren Duran has added 18 home runs and 66 RBIs. The projected starting pitcher for Boston is Payton Tolle, who is 8-6 with a 3.09 ERA and a 1.09 WHIP over 125.1 innings pitched this year. 

Seattle Mariners Betting Preview

The Seattle Mariners are 64-73 this season after they lost all three against the Blue Jays by scores of 1-8, 3-4, and 0-7. In game three, Seattle fell behind in the first inning and never got the bats going in the shutout loss. The Mariners recorded one hit and they were led by Raleigh, who went 1-3 in the game. Gilbert allowed six hits and three earned runs over 5.0 innings for the loss, while Davila allowed three earned runs in relief. Prior to that series, Seattle won two out of three against the Phillies and two out of three against the Cubs. 

This season, Seattle has a 4.16 ERA with a 1.24 WHIP and a .249 opponent batting average, while they have scored 530 runs with a .227 batting average and a .307 on base percentage. Cole Young has led the Mariners with 16 home runs and 57 RBIs, while Dominic Canzone has added 20 home runs and 59 RBIs. The projected starting pitcher for Seattle is George Kirby, who is 9-10 with a 4.02 ERA and a 1.33 WHIP over 147.2 innings pitched this season. 

Why the Boston Red Sox will win

• The Mariners have lost each of their last 10 night games against AL East opponents.
• The Red Sox have won each of their last six home games following a road loss.
• The Mariners have failed to cover the run line in each of their last 10 night games against AL East opponents.
• The Red Sox have covered the run line in seven of their last eight games against the Mariners following a loss.
• The Mariners have lost the first inning in three of their last four games.
• The Red Sox have led after 5 innings in nine of their last 11 night games at Fenway Park against AL opponents.
• The Red Sox have led after 3 innings in five of their last six night games against the Mariners at Fenway Park.

Why the Seattle Mariners will win

• The Mariners have won each of their last nine Monday night games.
• The Red Sox have lost five of their last six games as favorites against AL opponents.
• The Mariners have covered the run line in each of their last four games as underdogs following a road loss.
• The Red Sox have failed to cover the run line in five of their last six games as favorites against AL opponents.
• The Red Sox have trailed after 3 innings in five of their last six night games.
• The Red Sox have lost the first inning in three of their last four games against opponents that held a losing record.
• The Red Sox have trailed after 5 innings in four of their last five games.

Total Runs Facts

• Seven of the Mariners’ last eight night games as underdogs have gone OVER the total runs line.
• Seventeen of the last 20 games between the Mariners and Red Sox at Fenway Park have gone OVER the total runs line.
• There has been no run scored during the first inning in each of the Red Sox’s last seven night games against AL opponents.
• There has been at least one run scored in the first inning in 10 of the Mariners’ last 11 games as underdogs.

Boston Red Sox Player Prop Facts

• Willson Contreras has hit a home run in three of the Red Sox’s last four Monday night games at Fenway Park.
• Payton Tolle has recorded seven or more strikeouts in each of his last five appearances in night games.
• Jarren Duran has recorded at least one hit in each of the Red Sox’s last nine home games against the Mariners.
• Payton Tolle has recorded a win in five of his last six appearances against AL opponents.
• Willson Contreras ranks 6th amongst qualified players for On Base Percentage (.384) this season.

Seattle Mariners Player Prop Facts

• Cal Raleigh has hit at least one home run in each of the Mariners’ last three night games against opponents that held a winning record.
• George Kirby has recorded five or more strikeouts in seven of his last nine appearances in night games.
• Josh Naylor has recorded at least one hit in each of his last 10 appearances in night games against teams that held a winning record.

Matchup/League Facts

• The Red Sox rank 2nd in the league for doubles this season (247).
• The Red Sox rank 2nd in the league for home runs allowed this season (133).
• The Mariners rank 30th in the league for runs scored this season (530).
• The Mariners rank 30th in the league for hits this season (1024).

Red Sox vs Mariners Prediction 

Seattle comes into this matchup on a four game losing streak and they have scored a total of four runs in those four losses. The Mariners are 27-42 on the road this year, while the Red Sox are 34-32 at home. Boston has lost four of their last five games and they have allowed 25 runs in their last two. The Red Sox are starting Tolle, who has allowed two earned runs or fewer in four of his last five starts, while Kirby has allowed 1, 6, and 5 earned runs in his last three outings. Take the under here.