Seattle Mariners at Boston Red Sox: Betting Trends, Sep 2, 2026 (MLB)
The Seattle Mariners beat the Boston Red Sox 8-3 on September 2, 2026. This season the Seattle Mariners have covered the spread in 58 of 153 games (37.9%), and the Boston Red Sox have covered the spread in 72 of 153 games (47.1%) (2026). Every figure on this page is a count of settled games or a line a book posted. DataStreak does not produce picks. Updated September 18, 2026.
Final: SEA 8, BOS 3.
Probable starters: SEA Bryce Miller, BOS Patrick Sandoval.
The posted line
At williamhill_us as of September 2, 2026: BOS -1.5, total 8.5. A line is the number a book posted at that moment, shown as a fact about the market; it is not a forecast and it moves.
Against the spread, 2026 season
Covers of settled games. A cover is a settled game where the final margin beat the closing spread; pushes are left out of the rate.
| Team | Overall | Home | Road | Last 10 |
|---|---|---|---|---|
| Seattle Mariners | 58 of 153 (37.9%) | 28 of 75 (37.3%) | 30 of 78 (38.5%) | 4 of 10 (40%) |
| Boston Red Sox | 72 of 153 (47.1%) | 32 of 75 (42.7%) | 40 of 78 (51.3%) | 5 of 10 (50%) |
Previous meetings
Finished regular-season games between the two, this season and last, newest first.
| Date | Away | Home |
|---|---|---|
| 2026-09-01 | SEA 9 | BOS 6 |
| 2026-08-31 | SEA 8 | BOS 9 |
| 2026-06-21 | BOS 1 | SEA 3 |
| 2026-06-20 | BOS 5 | SEA 1 |
| 2026-06-19 | BOS 6 | SEA 2 |
| 2025-06-18 | BOS 3 | SEA 1 |
| 2025-06-17 | BOS 0 | SEA 8 |
| 2025-06-16 | BOS 2 | SEA 0 |
| 2025-04-24 | SEA 4 | BOS 3 |
| 2025-04-23 | SEA 8 | BOS 5 |
Seattle Mariners: last 5 games
| Date | Opp | Result |
|---|---|---|
| 2026-09-17 | @ LAA | W 7-2 |
| 2026-09-16 | @ LAA | L 1-2 |
| 2026-09-15 | @ LAA | L 4-6 |
| 2026-09-13 | @ OAK | L 7-8 |
| 2026-09-13 | @ OAK | W 19-1 |
Boston Red Sox: last 5 games
| Date | Opp | Result |
|---|---|---|
| 2026-09-18 | @ TEX | W 4-3 |
| 2026-09-17 | @ TEX | L 3-7 |
| 2026-09-16 | @ TEX | L 2-4 |
| 2026-09-13 | vs KC | W 4-1 |
| 2026-09-12 | vs KC | W 5-1 |
Over each player's last 20 games, the highest clear rate at the lowest posted rung of each market. Counts of games, not projections; each name opens the player's own page.
SEA players clearing their prop lines most often
| Player | Market | Line | Cleared | Rate |
|---|---|---|---|---|
| Logan Gilbert | Pitcher Strikeouts | 3+ strikeouts | 20 of 20 | 100% |
| Bryan Woo | Pitcher Strikeouts | 3+ strikeouts | 20 of 20 | 100% |
| Bryce Miller | Pitcher Strikeouts | 3+ strikeouts | 19 of 20 | 95% |
BOS players clearing their prop lines most often
| Player | Market | Line | Cleared | Rate |
|---|---|---|---|---|
| Sonny Gray | Pitcher Strikeouts | 3+ strikeouts | 20 of 20 | 100% |
| Payton Tolle | Pitcher Strikeouts | 3+ strikeouts | 19 of 20 | 95% |
| Patrick Sandoval | Pitcher Strikeouts | 3+ strikeouts | 11 of 12 | 91.7% |
Questions about Seattle Mariners at Boston Red Sox
Who has the better record against the spread, the Seattle Mariners or the Boston Red Sox?
The Seattle Mariners have covered in 58 of 153 games (37.9%) and the Boston Red Sox in 72 of 153 (47.1%) in the 2026 season, so the Boston Red Sox have the higher rate. A cover is a settled game where the final margin beat the closing spread; a rate is a count of past games, not a prediction of this one.
How have the last meetings between the Seattle Mariners and the Boston Red Sox gone?
Of the last 10 regular-season meetings this season and last, the Boston Red Sox won 5 and the Seattle Mariners won 5. The most recent was SEA 9, BOS 6 on September 1, 2026.
Which players in Seattle Mariners at Boston Red Sox clear their prop lines most often?
Logan Gilbert has cleared 3+ strikeouts in 20 of his last 20 games (100%); Bryan Woo has cleared 3+ strikeouts in 20 of his last 20 games (100%), over each player's last 20 games at the lowest posted rung. Counts of games, not projections.
Are these SEA at BOS numbers picks?
No. Every figure is a count of settled games or a line a book posted, shown with the games it comes from so the arithmetic is checkable. DataStreak does not produce picks. Updated September 18, 2026.
How these numbers are measured
A cover is a settled game where the final margin beat the closing spread; a push is a margin that landed on it. Previous meetings are finished regular-season games between the two teams. The prop rates count the games in which a player's stat reached the line over that player's last 20 games. A posted line is one book's number on one day. Nothing here is a projection.
Every MLB prop graded on this date: MLB player props, September 2, 2026. Both teams' full pages: Seattle Mariners and Boston Red Sox. The live board with every team and tonight's lines is the MLB ATS Radar. Every MLB player at a glance: MLB player prop hit rates, or read how the boards are built.