Seattle Mariners vs Boston Red Sox Prediction, Odds & Preview — Aug. 31, 2026
Seattle Mariners visit the Boston Red Sox on August 31, 2026, with first pitch listed for 6:45 PM ET at Fenway Park (Boston). Seattle Mariners enter at 64-73 and Boston Red Sox sit at 74-63.
Probable starters from the day's board: Seattle Mariners George Kirby (9-10, 4.02 ERA); Boston Red Sox Payton Tolle (8-6, 3.09 ERA). Starter listings can change; this page updates when the stored board changes.
Prediction Lab's stored Sharp Consensus currently gives Seattle Mariners a 58.3% win probability. That figure is a statistical model output for this matchup — not a guarantee, and not betting advice.
Game information
| Date | August 31, 2026 · 6:45 PM ET |
|---|---|
| Venue | Fenway Park (Boston) |
| Away | Seattle Mariners (64-73) |
| Home | Boston Red Sox (74-63) |
| Status | STATUS_IN_PROGRESS |
Pitchers
| Away | George Kirby |
|---|---|
| Home | Payton Tolle |
Model moneyline
| Model | Side | Prob |
|---|---|---|
| Grinder2 | Seattle Mariners | 60.3% |
| Takedown | Seattle Mariners | 62.7% |
| Edge | Boston Red Sox | 50.0% |
| XSharp | Seattle Mariners | 55.3% |
| Sharp Consensus | Seattle Mariners | 58.3% |
Sharp Consensus: Seattle Mariners (58.3%)
Why the models split
The stored models split on this moneyline. Seattle Mariners: Grinder2 (60.3%), Takedown (62.7%), XSharp (55.3%), Sharp Consensus (58.3%) Boston Red Sox: Edge (50.0%).
Sharp Consensus leans Seattle Mariners, while Edge lean the other way on the stored probabilities.
Takeaway
This preview is built from Prediction Lab's stored Seattle Mariners at Boston Red Sox board for August 31, 2026. The current Sharp Consensus lean is Seattle Mariners at 58.3%. Use the MLB picks page for the live card, then check graded results after the game. Model probabilities can be wrong; they are not locks.
