Boston Red Sox vs Seattle Mariners Prediction and Picks, September 2, 2026

The Boston Red Sox are swinging the bat well, winning six of their last ten games. They've been particularly strong against left-handed pitchers, hitting with a high average this year. Playing at home, they've shown they can score runs, so I think they'll contribute plenty to the scoreboard today. The Seattle Mariners, on the other hand, have struggled against lefties this season. Their recent form hasn't been great either, winning only four of their last ten games. With both teams likely to score, the combined total of over 8.5 runs seems a solid bet. The biggest risk here is that the Mariners may not hit well enough, but given the Red Sox's form, I'm optimistic.

Boston Red Sox vs Seattle Mariners: Seattle Mariners 1 Spread (-137)

The Boston Red Sox have won six of their last ten games, showing they can score runs, especially against left-handed pitchers. They've hit really well against lefties this year, with a strong on-base percentage, but they are facing the Seattle Mariners, who have struggled against lefties. The Mariners have a tough time hitting, managing a lower batting average against left-handed pitchers than the league average. Even though the Mariners have only won four of their last ten, they are better at home than on the road, and this game is nearly a toss-up. The most concrete risk is that both teams are pretty close in performance lately. Betting on the Mariners with the spread seems reasonable, considering their recent struggles against left-handers.

That is the full board for this game. Prices can move before you get on, so check the board at your bookmaker. Bet what you can afford to lose. If betting stops being fun, take a break.