Probables: BOS RHP Grant Toile vs. SEA RHP Logan Gilbert (6–5, 3.52 ERA)
First Pitch: 1:10 PM PT (4:10 PM ET)
Television: NESN, ROOT Sports Northwest, MLB.TV
Venue & Weather
T‑Mobile Park — Seattle, Washington
- Expected Conditions: 72°F, partly cloudy
- Wind: 6–9 mph out to left field
- Humidity: ~58%
- Chance of Rain: 10%
- Impact:
- Slight boost to right-handed pull hitters
- Marine air keeps overall run environment modest
- Run environment projected: –3% to +2% around league average
Injury Report
Boston Red Sox
- Triston Casas (rib) — Out, major power loss
- Rafael Devers (hamstring) — Day-to-day, expected to start
- Kenley Jansen (back) — Out, bullpen leverage weakened
- Brayan Bello (shoulder) — Out, rotation depth thin
Seattle Mariners
- Julio Rodríguez (ankle) — Day-to-day, expected to play
- Ty France (wrist) — Out, reduces right-handed power
- Matt Brash (elbow) — Out, bullpen depth reduced
- Andrés Muñoz (fatigue) — Available but monitored
Team Records & Recent Form
Boston Red Sox (31–43)
- Last 10: 3–7
- Road Record: 14–23
- Run Differential: –46
- Strengths: emerging young bats, improved OBP
- Weaknesses: rotation instability, bullpen collapse issues, lack of power without Casas
Seattle Mariners (39–39)
- Last 10: 5–5
- Home Record: 22–17
- Run Differential: +12
- Strengths: elite rotation, strong home-field performance
- Weaknesses: streaky offense, bullpen inconsistency without Brash/Muñoz at full strength
Series History
- 2023–2026 Combined: Mariners lead 10–7
- At T‑Mobile Park: Mariners lead 6–3
- Last 6 meetings: Mariners lead 4–2
- Average scoring in Seattle: 7.4 runs/game
Pitching Matchup Breakdown
BOSTON — RHP Grant Toile
(Scouting-based projection; limited MLB sample) Profile:
- Fastball: 94–96 mph
- Slider: 84–87 mph
- Curveball: 78–80 mph
- Changeup: 87 mph
- Command: inconsistent
- Fly-ball tendencies
Strengths:
- High strikeout potential
- Effective vs. right-handed hitters
- Good velocity plays well up in zone
Weaknesses:
- Fly-ball profile dangerous in Seattle with wind out
- Vulnerable to left-handed power
- Mariners have several LH threats (Cal Raleigh, J.P. Crawford, Dominic Canzone)
Mariners vs. Toile:
- First career matchup
SEATTLE — RHP Logan Gilbert
2026 Stats: 6–5, 3.52 ERA, 1.14 WHIP, 88 K in 89 IP Pitch Mix:
- 4-seam: 95–97 mph
- Slider: 85–87 mph
- Curveball: 79–81 mph
- Splitter: 86 mph
Strengths:
- Excellent command
- Dominant vs. right-handed hitters
- Strong home splits (3.11 ERA at T‑Mobile Park)
Weaknesses:
- Occasional HR issues vs. left-handed hitters
- Boston has several LH bats with lift (Yoshida, Duran, Devers if healthy)
Red Sox vs. Gilbert:
- Devers: 3-for-10, HR
- Yoshida: 2-for-6
- Duran: 1-for-5
Key Player Matchups
Rafael Devers (BOS) vs. Gilbert
- Devers hitting .295 with .540 SLG vs RHP in June
- Gilbert’s splitter is the key
- Edge: Devers
Julio Rodríguez (SEA) vs. Toile
- J‑Rod hitting .310 with .560 SLG vs RHP
- Toile’s fly-ball tendencies are a problem
- Edge: Rodríguez
Cal Raleigh (SEA) vs. Toile
- Raleigh hitting .270 with 14 HR at home
- Toile’s slider must be sharp
- Edge: Raleigh
Jarren Duran (BOS) vs. Gilbert
- Duran’s speed creates chaos
- Gilbert’s command reduces free passes
- Edge: Gilbert
Betting Trends
Boston Red Sox
- 2–8 in last 10 road games
- 1–6 in last 7 vs. AL West
- Over is 6–2 in last 8 Toile starts
- Red Sox 3–9 in last 12 Sunday games
Seattle Mariners
- 7–3 in last 10 home games
- 5–1 in last 6 vs. losing teams
- Under is 5–2 in last 7 Gilbert starts
- Mariners 4–1 in last 5 vs. BOS
Head-to-Head
- Mariners 4–2 last 6
- Under is 6–3 last 9 in Seattle
- Home team is 6–3 last 9
Game Odds
Boston Red Sox 6.5
Seattle Mariners – 136
Odds Courtesy of Sports Odds Direct as of Saturday, June 20, 2026
