Mariners vs Red Sox Prediction 9/1/2026 Today’s MLB Picks

In this article we will formulate a Mariners vs Red Sox prediction for this MLB game on Tuesday, September 1st at Fenway Park in Boston, Massachusetts. Let’s take a look at the prediction for this MLB matchup. 

Seattle Mariners Betting Preview

The Seattle Mariners are 64-74 this season after they lost game one by a score of 8-9 in 10 innings. Seattle led 8-5 in the seventh inning, but they fell apart and ended up with the loss in extra innings. The Mariners recorded 11 hits in the game and they were led by Arozarena, who went 4-5 with one home run and four RBIs. Kirby allowed seven hits and five earned runs over 5.0 innings, while Munoz blew the save and Criswell picked up the loss. Prior to this series, Seattle lost all three against the Blue Jays, but did win two out of three against the Phillies before that. 

This season, Seattle has a 4.18 ERA with a 1.25 WHIP and a .249 opponent batting average, while they have scored 538 runs with a .227 batting average and a .308 on base percentage. Randy Arozarena has led the Mariners with 21 home runs and 62 RBIs, while Dominic Canzone has added 20 home runs and 61 RBIs. The projected starting pitcher for Seattle is Bryan Woo, who is 9-9 with a 4.36 ERA and a 1.10 WHIP over 142.1 innings pitched this season. 

Boston Red Sox Betting Preview

The Boston Red Sox are 75-63 this year after they won game one by a score of 9-8 on Monday night. Boston blew an early 5-3 lead, but they rallied to tie the game in the ninth and they scored the only run in the 10th for the win. The Red Sox recorded 12 hits in the game and they were led by Rafaela, who went 2-4 with three RBIs. Tolle allowed six hits and four earned runs over 5.2 innings, while Chapman picked up the win. Prior to this series, Boston lost three out of four against the Yankees, but did win two out of three against the Marlins before that. 

This season, Boston has a 3.60 ERA with a 1.23 WHIP and a .241 opponent batting average, while they have scored 618 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 19 home runs and 68 RBIs. The projected starting pitcher for Boston is TBD. 

Why the Boston Red Sox will win

• The Mariners have lost each of their last eight night games against AL East opponents following a loss.
• The Red Sox have won 10 of their last 11 night games against AL West opponents.
• The Mariners have failed to cover the run line in seven of their last eight night games against AL East opponents following a loss.
• The Red Sox have covered the run line in each of their last four games as home favorites after going to extra innings.
• The Mariners have trailed after 3 innings in four of their last five road games.
• The Mariners have trailed after 5 innings in four of their last five road games.

Why the Seattle Mariners will win

• The Red Sox have lost five of their last seven games as home favorites against AL West opponents following a win.
• The Mariners have won seven of their last 10 games as underdogs following an extra innings loss.
• The Mariners have covered the run line in each of their last five games as underdogs following a road loss.
• The Red Sox have failed to cover the run line in each of their last four games as home favorites after playing the previous day.

Total Runs Facts

• Each of the Mariners’ last five night games as underdogs have gone OVER the total runs line.
• Eighteen of the last 21 games between the Mariners and Red Sox at Fenway Park have gone OVER the total runs line.
• There has been at least one run scored in the first inning in each of the Mariners’ last six night games against AL opponents.
• There has been at least one run scored in the first inning in eight of the last nine games between the Mariners and Red Sox at Fenway Park.

Boston Red Sox Player Prop Facts

• Jarren Duran has recorded at least one hit in each of the Red Sox’s last 10 home games against the Mariners.
• Jarren Duran has hit a home run in four of the Red Sox’s last seven home games against AL West opponents that held a losing record.

Seattle Mariners Player Prop Facts

• Randy Arozarena has hit a home run in four of the Mariners’ last five road games against AL East opponents that held a winning record.
• Taylor Ward has recorded a hit in each of his last eight appearances at Fenway Park against opponents that held a winning record.

Mariners vs Red Sox Prediction

Seattle comes into this matchup on a lengthy losing streak and they have allowed 6+ runs in four of their last five games. The Mariners are 27-43 on the road this year, while the Red Sox are 35-32 at home. Boston has lost three of their last five games and they have allowed 8+ runs in three straight. The Red Sox have not announced their starter yet, while Woo has allowed 6, 2, 0, 0, and 5 earned runs in his last five outings. Take the over here.

David Racey's Pick: Over 7