bayesRatings

Athletics at Red Sox

MLB · Sunday, Aug 9 · 12:35 PM CT · Fenway Park · Final ATH 4 – BOS 3

Final Box Score

from the game summary
Team123456789THE
ATH100100011491
BOS010020000361
Team box
ATH·BOS
9
hits
6
0
home runs
0
1
walks
3
11
strikeouts
4
135
pitches thrown
144
1
errors
1
Top hitters
PlayerTeamH-ABRHRRBI
Eli WhiteBOS3-4101
Jonah HeimATH1-4001
Tyler SoderstromATH1-4101
Max MuncyATH1-4001
Henry BolteATH2-5100
Jeff McNeilATH1-3100
Pitchers
PitcherTeamIPHERBBK
J.T. GinnATH6.05122
Elvis Alvarado (W)ATH1.00001
Hogan Harris (S)ATH1.01011
Erik MillerBOS1.02002
Aroldis Chapman (L)BOS1.02110

For context, not in our forecast.

Game Flow

score margin
BOS +3
ATH +3
123456789
largest lead: BOS 1 · ATH 1lead changes: 2

For context, not in our forecast.

Final · our forecast was ATH 35%, BOS 65% · Updated Aug 9

Expected margin
BOS by 1.9
Expected score
BOS 5.4 – 3.5 ATH
Expected total
8.9
AthleticsThe matchupRed Sox
+184Our fair odds−184
3.5Expected runs5.4
−0.35Power rating+0.20
4.3Runs / game4.5
5.7Allowed / game3.8
8.2Hits / game8.3
1.19Home runs / game1.02
3.4Walks drawn / game3.1
46−71Season record64−52
1−9Last 109−1

Prediction markets

Kalshi · Polymarket US · ProphetX · Novig
ATH chance · BOS chance
Our model fair35.3%64.7%
Kalshi34.5%69.5%
Polymarket USno two-sided price
ProphetXno two-sided price
Novigno two-sided price
Full price table
TeamOur modelfairKalshipre-game · 12:35 PM CTPolymarket US ProphetX Novig 
Moneyline
ATHAthletics+18435%+18934.5%———
BOSBoston Red Sox−18465%−22869.5%———
SpreadBOS by 1.9
ATHAthletics+1.9our margin————
BOSBoston Red Sox−1.9our margin————
Totalwe expect 8.9
Over8.9our total————
Under8.9our total————

These are each venue’s last prices before the start (Kalshi’s moneyline: its pre-game close). Odds are the price to buy that side now, taker fee included; the small percent is the implied chance of that same price. Highlighted is the best price in the row among venues on the same line. — means not listed (hover or tap for why). A market price is not the true chance of winning.

Margin range

Boston Red Sox by 1.9 expected
Athletics by 16 runs: <1%Athletics by 15 runs: <1%Athletics by 14 runs: <1%Athletics by 13 runs: <1%Athletics by 12 runs: <1%Athletics by 11 runs: <1%Athletics by 10 runs: <1%Athletics by 9 runs: <1%Athletics by 8 runs: 1%Athletics by 7 runs: 1%Athletics by 6 runs: 1%Athletics by 5 runs: 2%Athletics by 4 runs: 3%Athletics by 3 runs: 5%Athletics by 2 runs: 7%Athletics by 1 run: 14%Boston Red Sox by 1 run: 12%Boston Red Sox by 2 runs: 11%Boston Red Sox by 3 runs: 9%Boston Red Sox by 4 runs: 7%Boston Red Sox by 5 runs: 6%Boston Red Sox by 6 runs: 5%Boston Red Sox by 7 runs: 4%Boston Red Sox by 8 runs: 3%Boston Red Sox by 9 runs: 2%Boston Red Sox by 10 runs: 2%Boston Red Sox by 11 runs: 1%Boston Red Sox by 12 runs: 1%Boston Red Sox by 13 runs: 1%Boston Red Sox by 14 runs: <1%Boston Red Sox by 15 runs: <1%Boston Red Sox by 16 runs: <1%
← ATH wins byBOS wins by →
Boston Red Sox wins by 2 or more53%
Boston Red Sox wins by 3 or more41%
Athletics wins by 2 or more21%
Decided by one run26%

Centered on the expected margin above; shape from each team's expected runs, with ties after nine settled as one-run games, matched to 14,698 past MLB games.

Total range

8.9 expected
1 runs: 2%2 runs: 2%3 runs: 6%4 runs: 5%5 runs: 10%6 runs: 7%7 runs: 12%8 runs: 8%9 runs: 10%10 runs: 7%11 runs: 8%12 runs: 5%13 runs: 5%14 runs: 3%15 runs: 3%16 runs: 2%17 runs: 2%18 runs: 1%19 runs: 1%20 runs: 1%21 runs: 1%22 runs: <1%23 runs: <1%24 runs: <1%
Total runs, both teams
Total over 6.568%
Total over 8.549%
Total over 10.532%
Total from 7 to 1036%

Centered on the expected total above; shape from each team's expected runs, with ties after nine settled as one-run games, matched to 14,698 past MLB games.

Starting Pitchers

from the box score
ATHJ.T. Ginn SP · last 3 starts: 16.2 IP, 5.94 ERA, 19 Kstarted
BOSErik Miller RP · last 3 starts: 3.0 IP, 0.00 ERA, 3 Kstarted

Starting pitchers are part of our forecast.

Rest and Schedule

before this game
ATH·BOS
Aug 8 at BOS
last game
Aug 8 vs ATH
0 days
days of rest
0 days
6
games in last 7 days
6
6th straight road game
home / road
6th straight home game

For context, not in our forecast.

Team Comparison

2026 season · box-score averages from 116+ games
ATH·BOS
−0.35
rating (0 = average)
+0.20
4.3
runs / game
4.5
5.7
runs allowed / game
3.8
46−71
season record
64−52
21−36
home record
29−30
25−35
away record
35−22
W1
streak
L1
1−9
last 10
9−1
8.2
hits / game
8.3
1.19
home runs / game
1.02
3.4
walks drawn / game
3.1
8.7
batter strikeouts / game
8.2
8.6
pitcher strikeouts / game
8.6
0.44
errors / game
0.47

Rating Trend

ATH · BOS · 134 days
AthleticsBoston Red Sox
Rating (0 = average team)

Head to Head

last 10 meetings · BOS 5−5
Aug 8at BOSATH 7 − 3
Aug 7at BOSBOS 13 − 1
Jul 30at ATHBOS 5 − 4
Jul 29at ATHBOS 4 − 2
Jul 28at ATHATH 4 − 3
Jul 27at ATHBOS 4 − 2
Sep 18, 2025at BOSATH 5 − 3
Sep 17, 2025at BOSBOS 5 − 4
Sep 16, 2025at BOSATH 2 − 1
Sep 10, 2025at ATHATH 5 − 4

ATH · Last 10

1−9 · streak W1
Aug 8at BOS7 − 3W
Aug 7at BOS1 − 13L
Aug 6at CIN5 − 6L
Aug 5at CIN2 − 3L
Aug 4at CIN4 − 5L
Aug 2vs DET0 − 11L
Aug 1vs DET6 − 8L
Jul 31vs DET1 − 13L
Jul 30vs BOS4 − 5L
Jul 29vs BOS2 − 4L

BOS · Last 10

9−1 · streak L1
Aug 8vs ATH3 − 7L
Aug 7vs ATH13 − 1W
Aug 6vs CHW12 − 11W
Aug 5vs CHW4 − 0W
Aug 4vs CHW14 − 2W
Aug 2at LAD8 − 4W
Aug 1at LAD3 − 2W
Jul 31at LAD9 − 4W
Jul 30at ATH5 − 4W
Jul 29at ATH4 − 2W