bayesRatings

Astros at Giants

MLB · Wednesday, Aug 12 · 2:45 PM CT · Oracle Park · Final HOU 2 – SF 1

Final Box Score

from the game summary
Team123456789THE
HOU000000110240
SF100000000151
Team box
HOU·SF
4
hits
5
0
home runs
0
1
walks
5
7
strikeouts
8
138
pitches thrown
116
0
errors
1
Top hitters
PlayerTeamH-ABRHRRBI
Nick AllenHOU1-2001
Victor BericotoSF1-4001
Christian KossSF2-4000
Yordan AlvarezHOU1-3000
Taylor TrammellHOU1-3100
Nelson VelazquezHOU0-0001
Pitchers
PitcherTeamIPHERBBK
Bryan KingHOU0.20121
Steven Okert (W)HOU1.10000
Josh Hader (S)HOU1.00000
Adrian HouserSF6.02015
Keaton Winn (L)SF1.21100

For context, not in our forecast.

Game Flow

score margin
SF +3
HOU +3
123456789
largest lead: SF 1 · HOU 1lead changes: 1

For context, not in our forecast.

Final · our forecast was HOU 51%, SF 49% · Updated Aug 12

Expected margin
Even
Expected score
HOU 4.4 – 4.2 SF
Expected total
8.7
AstrosThe matchupGiants
−104Our fair odds+104
4.4Expected runs4.2
−0.01Power rating−0.11
4.6Runs / game4.1
4.8Allowed / game4.6
8.2Hits / game8.5
1.34Home runs / game1.12
3.4Walks drawn / game2.6
61−60Season record50−70
5−5Last 103−7

Prediction markets

Kalshi · Polymarket US · ProphetX · Novig
HOU chance · SF chance
Our model fair50.9%49.1%
Kalshi59.7%44.7%
Polymarket USno two-sided price
ProphetXno two-sided price
Novigno two-sided price
Full price table
TeamOur modelfairKalshipre-game · 2:45 PM CTPolymarket US ProphetX Novig 
Moneyline
HOUHouston Astros−10451%−14859.7%———
SFSan Francisco Giants+10449%+12444.7%———
Spreadabout even
HOUHouston Astros−0.2our margin————
SFSan Francisco Giants+0.2our margin————
Totalwe expect 8.7
Over8.7our total————
Under8.7our 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

Even game expected
Houston Astros by 13 runs: <1%Houston Astros by 12 runs: <1%Houston Astros by 11 runs: <1%Houston Astros by 10 runs: 1%Houston Astros by 9 runs: 1%Houston Astros by 8 runs: 2%Houston Astros by 7 runs: 2%Houston Astros by 6 runs: 3%Houston Astros by 5 runs: 4%Houston Astros by 4 runs: 6%Houston Astros by 3 runs: 7%Houston Astros by 2 runs: 10%Houston Astros by 1 run: 13%San Francisco Giants by 1 run: 15%San Francisco Giants by 2 runs: 10%San Francisco Giants by 3 runs: 7%San Francisco Giants by 4 runs: 5%San Francisco Giants by 5 runs: 4%San Francisco Giants by 6 runs: 3%San Francisco Giants by 7 runs: 2%San Francisco Giants by 8 runs: 1%San Francisco Giants by 9 runs: 1%San Francisco Giants by 10 runs: 1%San Francisco Giants by 11 runs: <1%San Francisco Giants by 12 runs: <1%San Francisco Giants by 13 runs: <1%
← HOU wins bySF wins by →
Houston Astros wins by 2 or more38%
Houston Astros wins by 3 or more28%
San Francisco Giants wins by 2 or more34%
Decided by one run28%

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

8.7 expected
1 runs: 2%2 runs: 2%3 runs: 6%4 runs: 5%5 runs: 11%6 runs: 7%7 runs: 12%8 runs: 8%9 runs: 10%10 runs: 6%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%
Total runs, both teams
Total over 6.567%
Total over 8.547%
Total over 10.530%
Total from 7 to 1037%

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
HOUBryan King RP · no recent starts on recordstarted
SFAdrian Houser SP · last 3 starts: 9.2 IP, 6.52 ERA, 13 Kstarted

Starting pitchers are part of our forecast.

Rest and Schedule

before this game
HOU·SF
Aug 11 at SF
last game
Aug 11 vs HOU
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 120+ games
HOU·SF
−0.01
rating (0 = average)
−0.11
4.6
runs / game
4.1
4.8
runs allowed / game
4.6
61−60
season record
50−70
30−29
home record
28−30
31−31
away record
22−40
L1
streak
W1
5−5
last 10
3−7
8.2
hits / game
8.5
1.34
home runs / game
1.12
3.4
walks drawn / game
2.6
8.1
batter strikeouts / game
7.9
8.7
pitcher strikeouts / game
7.5
0.44
errors / game
0.62

Rating Trend

HOU · SF · 137 days
Houston AstrosSan Francisco Giants
Rating (0 = average team)

Head to Head

last 10 meetings · SF 8−2
Aug 11at SFSF 4 − 1
Aug 10at SFHOU 6 − 3
Apr 2, 2025at HOUSF 6 − 3
Apr 1, 2025at HOUSF 3 − 1
Mar 31, 2025at HOUSF 7 − 2
Jun 12, 2024at SFSF 5 − 3
Jun 11, 2024at SFHOU 3 − 1
Jun 10, 2024at SFSF 4 − 3
May 3, 2023at HOUSF 4 − 2
May 2, 2023at HOUSF 2 − 0

HOU · Last 10

5−5 · streak L1
Aug 11at SF1 − 4L
Aug 10at SF6 − 3W
Aug 9at SD2 − 7L
Aug 8at SD2 − 3L
Aug 7at SD6 − 3W
Aug 5vs TOR4 − 5L
Aug 4vs TOR7 − 2W
Aug 3vs TOR1 − 3L
Aug 2vs TEX7 − 3W
Aug 1vs TEX5 − 4W

SF · Last 10

3−7 · streak W1
Aug 11vs HOU4 − 1W
Aug 10vs HOU3 − 6L
Aug 9vs DET1 − 3L
Aug 8vs DET0 − 8L
Aug 7vs DET5 − 2W
Aug 5at TEX0 − 6L
Aug 4at TEX4 − 5L
Aug 3at TEX5 − 1W
Aug 2at SD4 − 5L
Aug 1at SD5 − 6L