← BoardSeattle Mariners @ Boston Red Sox

Seattle Mariners 00 Boston Red Sox

65–74Seattle Mariners · .468
75–64Boston Red Sox · .540
first pitch
Fenway Parkvenue
37,755capacity

Probable starters

Seattle Mariners
4–8 · 4.12 ERA · 92 K in 94 IP
Career: 28–29 · 4.03 ERA · 456 K
Boston Red Sox
1–3 · 4.20 ERA · 48 K in 45 IP
Career: 20–48 · 4.03 ERA · 577 K

Lineups

Seattle Marinersactive roster · lineup not posted
121BJosh Naylor.694
22BCole Young.694
27DHTaylor Ward.682
22PBryan Woo4.25
45PJosé A. Ferrer3.75
13PKade Anderson4.50
99RFLazaro Montes1.850
90SSBrock Rodden.573
Boston Red Soxactive roster · lineup not posted
202BNick Sogard.781
37DHJahmai Jones.713
16LFJarren Duran.631
68PAlec Gamboa1.04
64PJake Bennett3.27
65PJedixson Paez18.90
54PSonny Gray2.82
75PWyatt Olds1.08
38RFEli White.665
52RFWilyer Abreu.799
10SSTrevor Story.594

Head to head

269–197Boston Red Sox all-time
466meetings
1977first met
2,407–2,093runs
Recent meetings
2026-08-318–9Boston Red Sox won
2026-06-213–1Seattle Mariners won
2026-06-211–5Boston Red Sox won
2026-06-202–6Boston Red Sox won
2025-06-181–3Boston Red Sox won
2025-06-178–0Seattle Mariners won
2025-06-160–2Boston Red Sox won
2025-04-244–3Seattle Mariners won

Projection

54%Seattle Mariners win probability
5.3 – 4.8projected score
1–10 / 1–980% ranges

Starting pitchers

Bryce MillerSeattle Mariners
Innings5.2 3.7–7.0
Strikeouts5.0 2–8
Walks1.9 0–4
Hits allowed5.4 3–9
Home runs0.9 0–2
Runs allowed2.7 0–6
Pitches87 63–110
2+ strikeouts96%
3+ strikeouts88%
4+ strikeouts75%
5+ strikeouts57%
6+ strikeouts39%
7+ strikeouts24%
Patrick SandovalBoston Red Sox
Innings4.9 3.3–6.7
Strikeouts5.0 2–8
Walks2.4 1–4
Hits allowed5.5 3–9
Home runs0.6 0–2
Runs allowed2.7 0–6
Pitches86 63–110
2+ strikeouts96%
3+ strikeouts88%
4+ strikeouts74%
5+ strikeouts56%
6+ strikeouts37%
7+ strikeouts23%
Each figure is the median of the simulated games with an 80% range beside it. Pitch counts are estimated from batters faced (fitted on 17,200 real outings; typical error 8 pitches). These assume the starter is not pulled early for a reason the model cannot see — an injury, a blowout, or a quick hook.
Estimates, not predictions. Full projection and how it was measured.