Red Sox vs. Mariners Dunkel MLB Picks, Predictions and Prop Bets - Sept. 2

Randy Arozarena rides a two-game homer streak into the Seattle Mariners' game versus the Boston Red Sox at 4:10 p.m. ET on Wednesday, at Fenway Park. Patrick Sandoval (1-3, 4.20 ERA) will start for the Red Sox, who are 75-64 this season and third in the AL East. Bryce Miller (4-8, 4.12 ERA) is starting for the Mariners, who are 65-74 and third in the AL West.

The Red Sox (-138) are moneyline favorites at home over the Mariners (+114). The game has an over/under set at 8.5 runs.

Red Sox vs. Mariners Odds, Game Time

• Game day: Wednesday, September 2, 2026
• Game time: 4:10 p.m. ET
• Location: Boston, Massachusetts
• Stadium: Fenway Park
• Favorite: Red Sox (-138)
• Underdog: Mariners (+114)
• Over/under: 8.5

How to Watch Red Sox vs. Mariners

• TV Channel: NESN and SEAM
• Live Stream: Fubo (Watch for free)

Bet now on FanDuel Sportsbook!

Red Sox vs. Mariners: Betting the Moneyline

• The Red Sox are 52-44 in games they were favored on the moneyline (winning 54.2% of those games).
• Seattle has been pegged as an underdog in 34 games this year and has walked away with the win 12 times (35.3%) in those games.
• Boston has a record of 26-22, a 54.2% win rate, when favored by -138 or more by bookmakers this season.
• This season, the Mariners have come away with a win three times in 12 chances when named as an underdog of at least +114 or worse on the moneyline.
• Based on this matchup's moneyline, the Red Sox have an implied win probability of 58%.
• The moneyline set for this matchup implies the Mariners have a 46.7% chance of coming away with a victory in the contest.

Red Sox vs. Mariners: Betting the Spread & Total

• The Red Sox have combined with opponents to go over the total 65 times this season for a 65-69-5 record against the over/under.
• So far this season, Seattle and its opponents have hit the over in 70 of its 139 games with a total.
• The Red Sox have a 68-71-0 record ATS this season (covering 48.9% of the time).
• The Mariners have an against the spread record of 53-86-0 in 139 games with a line this season.