Boston Red Sox defeat Seattle Mariners 9-8: Recap & Betting Results
Mon, Aug 31, 2026 · MLB · Seattle Mariners 8, Boston Red Sox 9
The Boston Red Sox beat the Seattle Mariners 9-8 on Monday, August 31, 2026, at Fenway Park. The Seattle Mariners covered the run line as 1.5-run underdogs. The game went over the closing total of 7.5, with 17 runs combined. AiQ's player props in this game went 1-0.
Seattle Mariners vs. Boston Red Sox final score and game recap
The Boston Red Sox won by 1 run.
The leading performers, from the box score:
- George Kirby (Seattle Mariners): 5.0 innings, 5 earned runs, 2 strikeouts.
- Randy Arozarena (Seattle Mariners): 4-for-5, 1 home run, 4 RBIs, 3 runs.
- Payton Tolle (Boston Red Sox): 5.2 innings, 4 earned runs, 6 strikeouts.
- Jarren Duran (Boston Red Sox): 1-for-4, 1 home run, 2 RBIs, 1 run.
Who covered the spread in Seattle Mariners vs. Boston Red Sox?
The Seattle Mariners covered the run line as 1.5-run underdogs, losing by 1 run.
The run line opened and closed at Boston Red Sox -1.5.
Did Seattle Mariners vs. Boston Red Sox go over or under the total?
The game went over: 17 runs combined against a closing total of 7.5, over by 9.5.
The total opened at 8 and closed at 7.5.
How did AiQ's Seattle Mariners vs. Boston Red Sox predictions do?
AiQ's player props in this game went 1-0.
- Player props: 1-0, +$58.82 on $100 a pick at the listed prices.
Seattle Mariners vs. Boston Red Sox player prop results
AiQ's player prop picks went 1-0 in this game, +$58.82 on $100 a pick at the listed prices.
- Payton Tolle (Boston Red Sox): over 5.5 strikeouts at -170, finished with 6, a win.
Seattle Mariners vs. Boston Red Sox odds: sportsbook value and line movement
Shortly before the start, the consensus moneyline had the Seattle Mariners at +139 and the Boston Red Sox at -157. With the bookmaker's margin removed, that made the Boston Red Sox a 59% favorite. The Boston Red Sox won as the favorite at -157: $63.69 profit on a $100 bet.
The total moved down from 8 to 7.5, and the game went over.
Seattle Mariners and Boston Red Sox betting trends: 2026 season
This result left the Seattle Mariners 64-74 in the 2026 regular season (37-31 at home, 27-43 away or at neutral sites). Against the run line, they covered in 49 of 134 games with a closing line on file. Their games went over the closing total 68 times and under 60 times, with 6 pushes. That made it five straight losses for the Seattle Mariners.
This result left the Boston Red Sox 75-63 in the 2026 regular season (35-32 at home, 40-31 away or at neutral sites). Against the run line, they covered in 67 of 136 games with a closing line on file. Their games went over the closing total 62 times and under 69 times, with 5 pushes.
What's next for Seattle Mariners and Boston Red Sox?
Next for the Seattle Mariners: at the Boston Red Sox on Tuesday, September 1, 2026. Next for the Boston Red Sox: the Seattle Mariners at home on Tuesday, September 1, 2026.