MLB matchup analysis

Royals vs Pirates Prediction, Odds and Model Pick

Friday, September 18, 2026 at PNC Park · 6:40 PM ET

Pass

Leo decision: Pass on Royals vs Pirates

Lab Rating
5.5/10
Model lean
Pirates 53.6%
Market probability
51.6%
Model edge
+2.0%
Best moneyline
-108
Sportsbooks checked
5
Leo model
53.6%
Market
51.6%

The case for Pittsburgh Pirates

Why Leo leans Pittsburgh Pirates
Leo's model makes Pittsburgh Pirates 53.6% to win. No single factor dominates — the starting pitcher matchup tilt the same way, enough to lean Pittsburgh Pirates even though it does not clear the bar for a high-confidence pick.

The case for Kansas City Royals

Late-inning bullpen advantage
Pittsburgh Pirates relievers have a 6.49 ERA over the last 7 days; Kansas City Royals relievers have a 4.67. If this is still close after six innings, that gap favors Kansas City Royals.

Why it is not official

Below the 61.0% official gate
Win probability is 53.6%. Leo does not make a game official below 61.0%, no matter how good the price is. This is a value spot, not a high-confidence winner.
Setup quality below the bar
Lab Rating is 5.5/10, under the 7.2/10 required for an official pick.
Own bullpen carries risk: 10.0/10
The Pittsburgh Pirates bullpen comes in high risk. A lead after six innings is less safe than usual.

Why the setup score is what it is

Conviction: 0/10
Leo's own win probability for Pittsburgh Pirates (53.6%) is close enough to a coin flip that the rating credits little or no conviction -- credit only starts above 55%.
Pitching plan: 28/40
Paul Skenes rates 71 on Leo's pitcher score, judged on its own merits (50-80 is the credited range). That is a strong start on its own, and it earns most or all of the available credit here.
Offense: 27.13/50
Pittsburgh Pirates's recent offensive form clearly outpaces Kansas City Royals's over the tracked windows.

Why the price is what it is

Team strength: 53.5%
Before any pitcher or bullpen adjustment, Leo's team-strength model alone makes Pittsburgh Pirates 53.5% to win. Everything below moves the price from this starting point.
Pitcher score gap: 2 points
The pitcher-score gap favors Pittsburgh Pirates by 2 points. This is the biggest single mover of the price -- a large gap moves it a lot, a small gap barely moves it.
Bullpen adjustment: -0.15
The bullpen-fatigue gap between the two pens nudges the price toward Kansas City Royals. This moves the price less than the starting pitchers do, since a starter covers more of the game than the bullpen.
Net effect: 53.5% -> 53.6%
Team strength alone had Pittsburgh Pirates at 53.5%. After the pitcher and bullpen terms, the price is 53.6% -- the same number shown as Model Lean above.
The verdict Leo passes. The combined Lab Rating did not clear the official threshold.
Read the full model output

The combined Lab Rating did not clear the official threshold.

Game information

MatchupKansas City Royals at Pittsburgh Pirates
DateFriday, September 18, 2026
First pitch6:40 PM ET
VenuePNC Park
Starting pitchersRandy Dobnak vs Paul Skenes
WeatherGame-time forecast: 69°F, 0% precipitation chance, 4 mph wind from NW.

Starting pitcher matchup

Full Pitcher Matchup Tool →
Randy DobnakRoyals · RHP
vs
Paul SkenesPirates · RHP
MetricRoyalsPirates
Pitching planTraditional starterTraditional starter
Expected innings5⅓5⅓
ThrowsRR
Leo pitcher score (higher is better)6671
ERA (lower is better)3.083.91
WHIP (lower is better)1.331.13
K/9 (higher is better)5.910.3
K-BB% (higher is better)7.5%21.0%
K% (higher is better)15.6%27.9%
BB% (lower is better)8.1%6.8%
BB/9 (lower is better)3.12.5
HR/9 (lower is better)0.91.0
Ground-ball rate58.1%44.1%
Fly-ball rate41.9%55.9%

Pitcher edge: Leo gives Paul Skenes a 5-point edge over Randy Dobnak, driven mainly by K/9 (10.3 vs 5.9) and K-BB% (21.0% vs 7.5%).

How to read this: the scorecards above name the starters; every number lives in this table.

Strikeout Projections Full strikeout projections →

Randy Dobnak strikeouts
3.5 Leo projected Ks
No K play · -0.0K difference is below Leo's 0.7K threshold
Market 3.5K · O +112 / U -141 · 5 books
Paul Skenes strikeouts
3.9 Leo projected Ks
Official pick: UNDER 5.5K · -1.6K difference
Market 5.5K · O +100 / U -122 · 5 books

Same data source as the Pitcher Matchup Tool, where every starter on the slate is compared side by side.

Royals are 4-6 in their last 10 and averaging 3.4 runs per game over the last 15 days; Pirates are 6-4 in their last 10 and averaging 3.4 runs per game over the last 15 days. On the season Pirates carry the better run differential per game (+0.16 against -0.63).

MetricRoyalsPirates
Last 104-66-4
Last 10 by venue (away team on the road, home team at home)5-5 on the road6-4 at home
OPS, last 15 days0.6500.713
wOBA, last 15 days (hot/cold read)0.2890.318
Runs per game, last 15 days3.43.4
K% last 15 days (lower is better)21.2%19.9%

Last 15 days only. Hot and cold streaks for all 30 teams live on the Stats page.

30-day offense

Full offense tool →
Last 30 daysRoyalsPirates
OPS0.747 (+0.034 vs szn)0.697 (-0.038 vs szn)
Runs per game4.52 (+0.311 vs szn)3.58 (-1.196 vs szn)
wOBA (model offense input)0.328 (+0.014 vs szn)0.312 (-0.014 vs szn)
K% (lower is better)19.5% (-1.4% vs szn)23.8%

Over the last 30 days the Royals have been the better offense, 0.328 wOBA to 0.312. They are running hot against their own season line (+0.014 wOBA).

Season profile

Full Stats page →
MetricRoyalsPirates
Record67-8676-77
Run differential / game (team quality)-0.63+0.16
Runs scored / game (offense, season)4.204.77
Runs allowed / game (defense, season, lower better)4.844.61
Season OPS0.7110.732
K% season (lower is better)20.9%24.1%
OPS vs opposing hand (season)0.7210.751

Season-long team quality, not recent form. Run differential and run environment come from the season standings; splits for all 30 teams live on the Stats page, including the run environment table.

Every team on today's slate, on any two axes you pick. Royals and Pirates are highlighted.

Royals
Combined risk
5.0 Normal
Fatigue
4.7 Normal
Efficiency
4.4 Below average
Pirates
Combined risk
10.0 High risk
Fatigue
10.0 High risk
Efficiency
3.1 Below average

Risk is what the model actually uses: fatigue blended with how well the pen has pitched. High fatigue with high efficiency is a tired pen that is still getting outs.

MetricRoyalsPirates
Fatigue4.7/10, Normal10.0/10, High risk
Efficiency4.4/10, Below average3.1/10, Below average
Combined risk5.0/10, Normal10.0/10, High risk
Relief innings, last 7 days17.334.7
Back-to-back arms65
7-day ERA4.676.49
7-day WHIP1.501.64

Fatigue measures workload. Efficiency measures recent run prevention. Combined risk is what the moneyline and totals systems use.

Run total projection

Full Totals Projections →
Leo projection
8.1
Market total
8.0
Projected away runs
4.2
Projected home runs
3.6
Over price
-107
Under price
-102
Kansas City Royals team total
4.2 projected
Line 3.5 · O -103 / U -115
Over research lean (+0.7)
Pittsburgh Pirates team total
3.6 projected
Line 4.5 · O -113 / U -109
Under research lean (-0.9)

The model and market are close. Team totals remain research-only until their graded sample is established.

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