Boston Red Sox vs Seattle Mariners Prediction & Picks - MLB

Prediction published on 8/31/26, 3:31 PM  by Lou Aguila | Modified on 9/6/26 at 4:40 PM in MLB Picks

The Boston Red Sox and the Seattle Mariners will kick off their series on Monday at Fenway Park.

The total has gone UNDER in 3 of the last 4 meetings between these two teams, making Under 8.0 runs an enticing option for bettors looking for a safe pick.

Current Form:

The Seattle Mariners have lost their last four games, including three straight losses to the Toronto Blue Jays. Over the last five games, the Mariners have averaged 1.6 runs per game and pitched to a 5.57 ERA.

The Boston Red Sox have also gone 1-4 in their last five games. At 74-63, the Red Sox sit in third place in the AL East, trailing the 78-59 New York Yankees by 4.5 games and the 82-54 Tampa Bay Rays by 8.5 games. Boston has struggled mightily on both sides of the ball lately, posting a 6.15 ERA and averaging 1.8 runs per game over their last five games.

Starting Pitchers: Red Sox LHP Payton Tolle (8-6. 3.09 ERA) vs. Mariners RHP George Kirby (9-10, 4.02 ERA)

The Matchup: Boston is 4-2 against Seattle in their last 6 meetings. The total has gone UNDER in 3 of their last 4 games.