bayesRatings

Royals at Pirates

MLB · Sunday, Sep 20 · 12:35 PM CT · PNC Park · Final KC 3 – PIT 4

Final Box Score

from the game summary
Team123456789THE
KC100000200391
PIT00010102481
Team box
KC·PIT
9
hits
8
1
home runs
2
1
walks
5
8
strikeouts
9
182
pitches thrown
138
1
errors
1
Top hitters
PlayerTeamH-ABRHRRBI
Rafael Flores Jr.PIT2-3112
Vinnie PasquantinoKC1-1112
Oneil CruzPIT1-4111
Salvador PerezKC2-4001
Jac CaglianoneKC2-3000
Spencer HorwitzPIT1-4001
Pitchers
PitcherTeamIPHERBBK
Michael WachaKC5.24245
Nate Pearson (L)KC0.23201
Lake BacharPIT1.03101
Carmen Mlodzinski (W)PIT3.03211
Mason Montgomery (S)PIT1.01001

For context, not in our forecast.

Game Flow

score margin
PIT +3
KC +3
123456789
largest lead: PIT 1 · KC 1lead changes: 3

For context, not in our forecast.

Final · our forecast was KC 44%, PIT 56% · Updated Sep 20

Expected margin
PIT by 0.6
Expected score
PIT 4.8 – 4.2 KC
Expected total
8.9
RoyalsThe matchupPirates
+128Our fair odds−128
4.2Expected runs4.8
−0.15Power rating+0.02
4.2Runs / game4.8
4.9Allowed / game4.6
8.2Hits / game8.7
1.04Home runs / game1.15
3.2Walks drawn / game3.5
67−88Season record78−77
3−7Last 106−4

Prediction markets

Kalshi · Polymarket US · ProphetX · Novig
KC chance · PIT chance
Our model fair43.8%56.2%
Kalshi49.7%54.7%
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
KCKansas City Royals+12844%+10149.7%———
PITPittsburgh Pirates−12856%−12154.7%———
SpreadPIT by 0.6
KCKansas City Royals+0.6our margin————
PITPittsburgh Pirates−0.6our 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

Pittsburgh Pirates by 0.6 expected
Kansas City Royals by 14 runs: <1%Kansas City Royals by 13 runs: <1%Kansas City Royals by 12 runs: <1%Kansas City Royals by 11 runs: <1%Kansas City Royals by 10 runs: <1%Kansas City Royals by 9 runs: 1%Kansas City Royals by 8 runs: 1%Kansas City Royals by 7 runs: 2%Kansas City Royals by 6 runs: 2%Kansas City Royals by 5 runs: 4%Kansas City Royals by 4 runs: 5%Kansas City Royals by 3 runs: 6%Kansas City Royals by 2 runs: 9%Kansas City Royals by 1 run: 13%Pittsburgh Pirates by 1 run: 15%Pittsburgh Pirates by 2 runs: 10%Pittsburgh Pirates by 3 runs: 8%Pittsburgh Pirates by 4 runs: 6%Pittsburgh Pirates by 5 runs: 5%Pittsburgh Pirates by 6 runs: 4%Pittsburgh Pirates by 7 runs: 3%Pittsburgh Pirates by 8 runs: 2%Pittsburgh Pirates by 9 runs: 1%Pittsburgh Pirates by 10 runs: 1%Pittsburgh Pirates by 11 runs: 1%Pittsburgh Pirates by 12 runs: <1%Pittsburgh Pirates by 13 runs: <1%Pittsburgh Pirates by 14 runs: <1%
← KC wins byPIT wins by →
Pittsburgh Pirates wins by 2 or more41%
Pittsburgh Pirates wins by 3 or more31%
Kansas City Royals wins by 2 or more31%
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

8.9 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%
Total runs, both teams
Total over 6.569%
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
KCMichael Wacha SP · last 3 starts: 18.0 IP, 3.50 ERA, 13 Kstarted
PITLake Bachar RP · last 3 starts: 6.0 IP, 1.50 ERA, 7 Kstarted

Starting pitchers are part of our forecast.

Rest and Schedule

before this game
KC·PIT
Sep 19 at PIT
last game
Sep 19 vs KC
0 days
days of rest
0 days
6
games in last 7 days
6
9th straight road game
home / road
6th straight home game

For context, not in our forecast.

Team Comparison

2026 season · box-score averages from 155+ games
KC·PIT
−0.15
rating (0 = average)
+0.02
4.2
runs / game
4.8
4.9
runs allowed / game
4.6
67−88
season record
78−77
39−36
home record
41−36
28−52
away record
37−41
L3
streak
W3
3−7
last 10
6−4
8.2
hits / game
8.7
1.04
home runs / game
1.15
3.2
walks drawn / game
3.5
7.9
batter strikeouts / game
9.3
7.2
pitcher strikeouts / game
9.2
0.45
errors / game
0.61

Rating Trend

KC · PIT · 176 days
Kansas City RoyalsPittsburgh Pirates
Rating (0 = average team)

Head to Head

last 10 meetings · PIT 5−5
Sep 19at PITPIT 6 − 5
Sep 18at PITPIT 8 − 5
Jul 9, 2025at KCKC 4 − 3
Jul 8, 2025at KCKC 4 − 3
Jul 7, 2025at KCKC 9 − 3
Sep 15, 2024at PITPIT 4 − 3
Sep 14, 2024at PITKC 5 − 1
Sep 13, 2024at PITKC 8 − 3
Aug 30, 2023at KCPIT 4 − 1
Aug 29, 2023at KCPIT 6 − 3

KC · Last 10

3−7 · streak L3
Sep 19at PIT5 − 6L
Sep 18at PIT5 − 8L
Sep 17at HOU2 − 6L
Sep 16at HOU5 − 2W
Sep 15at HOU2 − 4L
Sep 13at BOS1 − 4L
Sep 12at BOS1 − 5L
Sep 11at BOS3 − 2W
Sep 9vs ARI5 − 2W
Sep 8vs ARI3 − 5L

PIT · Last 10

6−4 · streak W3
Sep 19vs KC6 − 5W
Sep 18vs KC8 − 5W
Sep 17vs MIL7 − 4W
Sep 16vs MIL4 − 5L
Sep 15vs MIL1 − 5L
Sep 13at CHC4 − 3W
Sep 12at CHC3 − 4L
Sep 11at CHC2 − 12L
Sep 10at CHW2 − 0W
Sep 9at CHW4 − 2W