The Seattle Mariners visit the Boston Red Sox on Tuesday, September 1, 2026, in what looks like a competitive matchup. Seattle holds a 64-74 record, while Boston stands at a stronger 75-63. This suggests the Red Sox have had a better season overall.
Looking at the betting odds, Boston is favored. The home moneyline is -126, meaning you’d need to bet $126 to win $100 on the Red Sox outright. Seattle’s moneyline is +104, so a $100 bet on the Mariners would win you $104 if they pull off the upset.
The spread is set at 1.5 runs. Seattle is +1.5 at -207, meaning you’d have to bet $207 to win $100 if you take the Mariners and they lose by one run or win outright. Boston is -1.5 at +169, so a $100 bet wins $169 if the Red Sox win by two or more runs.
The total runs line is 7.0, with the “over” priced at -124 and the “under” at +103. The prices indicate a slight lean toward the under, but it’s close enough that either side could be justified depending on pitching and offense.
In summary, Boston is the favorite at home, but the Mariners get some cushion with the +1.5 spread. The game looks fairly balanced, with a modest total. Bettors should weigh the value between the moneyline and spread based on risk preference.