Seattle Mariners vs Boston Red Sox Prediction, 9/2/2026 MLB Picks, Best Bets & Odds

Game: Seattle Mariners vs Boston Red Sox

Date: Wednesday, September 2, 2026

Location: Fenway Park in Boston, MA

TV: NESN

Odds/Point Spread: Seattle (+126) Boston (-152)

The Boston Red Sox (75-63) will try to defeat the Seattle Mariners (64-74) at Fenway Park on Wednesday. The moneyline on this contest has Seattle at +126 while Boston opens at -152. The over/under has been set at 8. The starting pitchers are Bryce Miller and Patrick Sandoval.

The Mariners have hit 163 two-baggers as a squad and have hit 159 balls out of the park. Seattle has a slugging percentage of .374 and have struck out 1,204 times, while being walked on 462 occasions. As a unit, the Seattle Mariners are scoring 3.9 runs per outing, which has them sitting at 30th in MLB. They have accumulated 519 runs batted in and 1,035 base knocks this year, and their batting average is sitting at .227. They are sitting with 538 runs while holding a team on-base percentage of .308.

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The Mariners have an earned run average of 4.18 on the campaign (18th in baseball), and their staff has struck out 1,163 batters. Mariners pitchers have surrendered 163 home runs in addition to 611 runs (15th in the league). Their pitching staff has walked 364 players from the other team and their FIP is 3.96 as a unit on the season. Seattle has surrendered 1,155 base hits (8.5 per 9 innings) and 566 earned runs. They have earned a K/BB ratio of 3.20 and the pitching staff has a team WHIP of 1.25.

The Mariners have dispatched 420 relief pitchers to the hill this year. The relievers have inherited 139 base runners on the campaign with 30.9% of them ended up crossing the plate. The bullpen have notched 73 holds for the year (18th in MLB). Mariners relief pitchers have stepped onto the hill with runners on 100 times and also have had 139 appearances in high leverage situations. They have recorded 30 saves so far this season and have blown 23 of their 53 save opportunities. The Mariners relief pitchers have earned a save rate of 56.6% and have come into the game in 127 save situations.

The Mariners have converted 69.2% of balls hit into play into outs in their 10,956 innings on the diamond, which ranks them 23rd in the majors. The Seattle Mariners have notched a total of 3,652 putouts so far this season, in addition to 1,131 assists and 71 errors. Their fielding percentage sits at .985 which puts them in 15th in the majors, and have accumulated 112 double plays.

Miller (28-29 record in his career) is the owner of a FIP of 3.97 while he has gone up against 2,009 hitters during his time in the majors. He has allowed 425 base knocks (7.7 hits per nine innings) with 130 walks. His ERA is 4.03 (222 ER's allowed) and his career WHIP is 1.119. Miller has taken the ball for 496 frames and has tallied 456 strikeouts so far in his pro baseball career.

The Red Sox hold a slugging percentage of .405 and they score 4.48 runs per contest (16th in the league). They have hit 250 doubles, while walking 445 times and earning 618 runs. Boston has compiled 140 home runs so far this year to go along with 590 runs batted in. They have struck out on 1,111 instances (21st in baseball) and have notched a total of 1,154 base hits. The Boston Red Sox have accounted for a team on-base percentage of .323 as well as a batting average of .249 over the course of the season.

The Red Sox hold a team WHIP of 1.233 and have a FIP of 3.70 as a staff for the season. They currently have a K/BB ratio of 8.60 (1,179 strikeouts vs 397 bases on balls). They have a ranking of 16th in the league as a staff in total hits surrendered with 1,116. They have given up 135 home runs and they surrender 3.91 runs per 9 innings (5th in baseball). The Boston pitching staff have allowed 533 runs this year while having an ERA of 3.60 (491 earned runs allowed).

Boston relievers have an inherited score percentage of 30.8% out of their 146 inherited base runners. Their relief pitchers have stepped onto the hill 126 times in high leverage situations and on 110 occasions with runners on base. With 134 save situations, the Red Sox have amassed 82 holds in addition to 13 blown saves. They are currently ranked 5th in the league with a save rate of 74.0%, and they have dispatched 424 bullpen pitchers onto the diamond for the season.

The Boston Red Sox have turned 100 double plays and have a fielding percentage of .985 (18th in pro baseball). The Red Sox have accrued 1,197 assists, 75 errors and have notched a total of 3,682 putouts on the season. In 11,046 innings on the field, the Red Sox have a defensive efficiency of 69.5% (21st in professional baseball).

So far in his MLB career, Sandoval has given up 565 hits while totaling 577 punch outs in 581 innings. Sandoval (20-48 career win-loss record) holds a 4.03 ERA while surrendering 8.8 hits per nine innings. He has allowed 260 ER's while earning a WHIP of 1.417 and being the owner of a FIP of 4.0. His K/BB ratio is 2.24 and he has gone up against 2,541 hitters so far in his career.

Who will win tonight's MLB game against the spread or moneyline?

Josh Schonwald's Pick: Take Boston (-152)

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