SEA @ BOS

Wednesday · September 2, 2026·full·gamePk 824717free Saturday
refreshed 572h 12m ago both lineups confirmed

weather · Fenway Park

gametime 4:10 PM EDT · open-meteo
temperature
72°F
humidity 64%
wind
12 mph
in from LF
precip
0%
overcast
park
BOS
open · HP→CF 46°
CFHP1B3BIN
wind impact on total
-0.24 R/Gminor in

Minor wind in: -0.24 R/G vs neutral. _Green Monster blocks LF wind — wind-out games still play big to RF only; foul territory tiny_

starters · IP-weighted 2025+2026

metricBryce MillerRHP · SEAPatrick SandovalLHP · BOS
xERA 20263.185.09
xwOBA 20260.2770.344
wOBA−xwOBA 20260.0230.025
xERA 20255.30—
xwOBA 20250.352—
Outs/TB 25-261.781.61
FIP 25-264.734.22
kwERA 25-263.713.89
K% 25-2621.7%23.2%
BB% 25-267.6%10.6%
IP 25+26 combined184.345.0
ERA actual 20264.124.20
ERA (L4)9.005.14
WHIP (L4)1.701.76
K% (L4)19.6%23.5%
BB% (L4)13.0%12.2%
IP/gm (L4)5.005.25
L4 window08/06→08/23 (4 st)08/11→08/28 (4 st)
Stuff+ last 3 (Δ szn)103 (−4)98 (−3)
SIERA last 3 (Δ szn)4.41 (+0.68)4.55 (+0.22)
Arsenal RV/1000.14-1.41

away arsenal — SEA

RV/100 0.14
  • 4-Seam Fastball—+0.60xwOBA 0.295
  • Split-Finger—+0.70xwOBA 0.218
  • Slider—-1.40xwOBA 0.363
  • Sweeper—+2.00xwOBA 0.229
  • Sinker—-1.50xwOBA 0.323
  • Cutter—-3.60xwOBA 0.404
  • Curveball—+0.80xwOBA 0.196

home arsenal — BOS

RV/100 -1.41
  • Slider—-2.30xwOBA 0.342
  • Changeup—+1.50xwOBA 0.179
  • Sinker—-3.40xwOBA 0.511
  • 4-Seam Fastball—-1.30xwOBA 0.411
  • Sweeper—-3.50xwOBA 0.272

away · SEA vs LHP

confirmed
Σ xwOBA
2.927
Σ match
3.259
Σ FRV
-25.5
#posbatterxwOBAmatchFRV
1LFRandy Arozarena0.3470.396-7.5
2DHDominic Canzone0.3560.402+0.3
3CFJulio Rodríguez0.3380.387-0.9
41BJosh Naylor0.3150.349+2.8
5RFTaylor Ward0.3370.374-1.4
62BCole Young0.3170.353-3.1
73BWeston Wilson0.2580.304-8.4
8SSJ.P. Crawford0.3210.353-7.2
9CJhonny Pereda0.3380.339-0.1

home · BOS vs RHP

confirmed
Σ xwOBA
2.804
Σ match
2.563
Σ FRV
+15.6
#posbatterxwOBAmatchFRV
1DHRoman Anthony0.3600.333+0.5
21BMickey Gasper0.3680.351-2.3
3CFCeddanne Rafaela0.2800.249+14.8
4RFWilyer Abreu0.3490.306+4.1
52BNick Sogard0.3220.294+1.4
63BCaleb Durbin0.2860.256+3.8
7LFJarren Duran0.3000.262+4.1
8SSTrevor Story0.2490.237-2.7
9CConnor Wong0.2900.275-8.2

defense · SEA catcher (Savant FRV)

Jhonny Pereda
  • FRV-0.1
  • framing-0.6
  • blocking+0.3
  • throwing+0.3

defense · BOS catcher (Savant FRV)

Connor Wong
  • FRV-8.2
  • framing-7.3
  • blocking+0.6
  • throwing-1.4

SEA · Bryce Miller

Last outing 2026-08-23 vs CHC · 4.1 IP

Latest-start ratings unavailable: the provider rating has not been matched to this official outing.

MetricPrior gamesLatest (Δ)Last 3
Stuff+——103
Location+——116
Pitching+——118
botOvr——58
SIERA——4.41

Last 3 starts: 2026-08-12 → 2026-08-23. 0/3 outings have verified ratings.

Complete-window ratings are pending. Available dated context:

Prior games = unweighted average before 2026-08-23; SIERA here is an average of game ratings, not aggregate season SIERA. Stuff+ family: 100 average. PitchingBot: 50 average. Lower SIERA/botERA is better.

BOS · Patrick Sandoval

Last outing 2026-08-28 vs NYY · 5.1 IP

Latest-start ratings unavailable: the provider rating has not been matched to this official outing.

MetricPrior gamesLatest (Δ)Last 3
Stuff+——98
Location+——101
Pitching+——104
botOvr——53
SIERA——4.55

Last 3 starts: 2026-08-16 → 2026-08-28. 0/3 outings have verified ratings.

Complete-window ratings are pending. Available dated context:

Prior games = unweighted average before 2026-08-28; SIERA here is an average of game ratings, not aggregate season SIERA. Stuff+ family: 100 average. PitchingBot: 50 average. Lower SIERA/botERA is better.

Bullpen depth chart · per side

Derived = season-usage role from pitcher-profiles.json. Card tag = what tonight's card thinks. When they disagree, the sim picker may target wrong arms in save windows. Mean IP/app distinguishes 1-IP relievers from bulk arms.

SEA · bridge (non-closer, 6-8)8 arms · kwera
0.43R / inningband [0.37–0.50]
0.102 R/PA · 0.144 R/out · worst: Hoby Milner (4.69)
BOS · bridge (non-closer, 6-8)7 arms · kwera
0.37R / inningband [0.31–0.43]
0.086 R/PA · 0.122 R/out · worst: Alec Gamboa (4.08)

SEA

PitcherDerivedCardFIPK%BB%Mean IPSV/HD/GFTrend
Andrés MuñozCLOSERCL2.9338.49.50.9324/0/29stable
José A. FerrerSETUPSU4.0217.66.30.893/13/7stable
Eduard BazardoSETUPMR4.0423.37.60.940/26/2stable
Gabe SpeierSETUPMR4.2120.88.80.821/18/5stable
Hoby MilnerSETUPMR4.8911.85.90.941/6/7stable
Seranthony DomínguezSETUPMR5.1026.013.70.8912/6/18stable
Michael RuckerMRMR3.7426.89.21.050/1/6stable
Cooper CriswellMRLR3.9218.48.01.181/3/12stable
Carlos VargasunknownMR1.4530.06.7—0/0/0—

BOS

PitcherDerivedCardFIPK%BB%Mean IPSV/HD/GFTrend
Aroldis ChapmanCLOSERCL2.4131.710.60.9630/0/27stable
Garrett WhitlockSETUPSU2.2029.24.10.972/22/7stable
Erik MillerSETUPSU2.9334.613.30.864/12/7stable
Greg WeissertSETUPMR4.1323.97.70.961/6/4stable
Jovani MoránOPENERMR4.5325.911.91.530/4/6ramping down
Alec GamboaMRMR3.1218.07.01.601/1/5ramping up
Wyatt OldsunknownMR3.6927.010.8—0/0/0—
Raymond BurgosunknownMR4.3014.62.1—1/0/0—

glossary

Pitcher metrics

  • xERA (Savant): Statcast's expected ERA, derived from xwOBA. Strips defense/luck — what the pitcher's contact quality says he should have given up.
  • xwOBA (Savant): Expected wOBA. Treats each batted ball by exit velo + launch angle (independent of where defenders stood). Lower = better for pitcher.
  • wOBA-xwOBA (Savant): Actual minus expected. Negative = the pitcher has been UNLUCKY (better than results show). Positive = LUCKY (worse than results show).
  • Outs/TB: Outs recorded ÷ total bases allowed. Custom efficiency metric. Higher = more efficient. Starter range typically 1.5–3.0.
  • FIP: Defense-independent ERA estimator using only K/BB/HBP/HR. Removes BABIP luck. Same scale as ERA.
  • kwERA: Strikeout-and-walk-only ERA estimator. 5.40 − 12·(K−BB)/PA. Strips contact entirely. K-BB% is the most stable pitcher skill.
  • K% / BB%: Strikeouts / walks as a share of total batters faced.
  • IP (25+26 combined): Total innings across the prior + current season — defines the IP-weight on combined stats.
  • Arsenal RV/100 (Savant): Run Value per 100 pitches, weighted across the pitcher's mix. POSITIVE = stuff playing well for the pitcher. Substitute for FanGraphs Stuff+.

Batter metrics

  • AVG/OBP/SLG: Standard slash line, current season.
  • vs L/RHP AVG/OBP/SLG (PA): Same line, but only against pitchers of the hand the batter is facing tonight. PA = sample size — small samples (<50 PA) are noisy.
  • xwOBA / xBA / xSLG (Savant): Statcast expected stats for the batter, based on contact quality.
  • xwOBA(25) (Savant): Last year's xwOBA. Useful when current-year sample is thin.
  • FRV (Savant): Fielding Run Value. Range + arm + framing + blocking + DP turns. Cumulative — early-season values are small.
  • Match xwOBA: Projected weighted xwOBA against this specific pitcher's pitch mix. Per pitch (with usage %), look up batter's xwOBA vs that pitch type, weighted average.
  • Cov%: Share of opposing pitcher's pitch usage where we have direct batter-vs-pitch data. Lower coverage = less reliable matchup score.

Lineup status

  • 🟢 CONFIRMED: Posted by the team via MLB Stats API. This is the actual lineup playing.
  • 🟡 EXPECTED: Projected from the team's last 21 days of starts vs the same handedness, with current IL filtered out. Refreshes ~T-90 min before first pitch.

Data sources

  • MLB Stats API (statsapi.mlb.com): schedule, lineups, raw counting stats (K/BB/HR/IP/AVG/etc.), L/R splits.
  • Baseball Savant (Statcast): xERA/xwOBA, pitch arsenal, Fielding Run Value, expected stats. Descriptive only — no projection system.
  • Baseball Prospectus: DRC+ + PECOTA when authed.
  • Open-Meteo: Weather forecast rotated to the park.

Post-game

actual vs projected
Final total
11
8 SEA · 3 BOS
Projected total
—
Delta
—
actual − projected
Band cover
—

SEA

8 R

12H · 0HR · 5BB · 5K · 18LOB

OBPe 0.419 · SLGe 0.351 · K% 11.6

Their pitching

9.0 IP · 3 ER · 5 K · relief 4.3 IP · 5 arms

BOS

3 R

12H · 1HR · 1BB · 5K · 16LOB

OBPe 0.342 · SLGe 0.540 · K% 13.2

Their pitching

9.0 IP · 7 ER · 5 K · relief 5.0 IP · 3 arms

SEA · standout lines

big nights
  • J.P. Crawford (SS) · 3-3 | BB, 2 R3 H
tough nights
  • Taylor Ward (RF) · 0-5 | K0-for-5
  • Cole Young (2B) · 0-4 | HBP, K, R0-for-4

BOS · standout lines

big nights
  • Roman Anthony (DH) · 3-5 | HR, K, RBIHR · 3 H
  • Wilyer Abreu (RF) · 3-4 | 2 2B, R3 H · 5 TB
tough nights
  • Nick Sogard (2B) · 0-4 | K0-for-4
  • Jarren Duran (LF) · 0-40-for-4
  • Connor Wong (C) · 0-4 | K0-for-4
sources · MLB Stats API · Baseball Savant · Baseball Prospectus · Open-Meteo · reference, not picks