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  • Projections
    In-house Bayesian model · career prior + aging × stuff/discipline signals
  • Plate Discipline
    Decision+ · chase / passive cost · K% · BB%
  • Command & Stuff
    Pitching+ · Stuff+ · Command+ · meatball rate
  • Pitcher Stuff Lab
    In-zone whiff · xwOBAcon · tunnel · deception · count predictability
  • Stuff Model (diag)
    From-scratch XGBoost training runs, feature importance, pitcher grades
  • Expected Points
    Luck-neutral fantasy points · xSLG / xwOBA · ΔPts
  • Hitter Frontier
    Power × discipline tradeoff · Pareto-frontier hitters
  • Pitcher Frontier
    Process × contact-suppression · pound the zone vs limit damage
  • Hitter Vulnerabilities
    Biggest pitch-trait strengths & weaknesses · vs league or vs own
  • AAA Hitters
    Triple-A bats · xwOBA · contact quality · discipline · frontier
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Jonah Heim

Jonah Heim

C·ATH
Compare
Compare
PA
435
H
84
HR
11
AVG
.212
xwOBA
.278
PPG
1.31
Career Seasons
YrGPAAVGOBPSLGISOxwOBAK%BB%K-BB%HRSBPtsPPGxPPG
20262786.205.271.436.231.28617.4%8.1%9.3%40592.19—
2025125435.212
2025 MLB Percentiles

Hitting Profile

435 PA — below qualified cutoff. Percentiles vs. qualified pool (faded).

Expected Results
xwOBA
0
.278
xBA
7
.226
.272
.330
.118
.278
20.2%
7.4%
12.8%
11
3
164
1.31
—
2024135491.220.268.336.116.28218.3%5.3%13.0%1312061.53—
2023152502.258.319.437.179.32719.1%8.0%11.1%1833422.25—
2022130450.227.299.399.172.29319.3%9.1%10.2%1622331.79—
202182285.196.242.358.162.28720.4%5.3%15.1%1031211.48—
20201341.211.268.211.000.3007.3%7.3%0.0%00181.38—
xSLG
4
.355
Quality of Contact
Avg EV
16
87.7
Median EV
20
90.8
90th % EV
13
102.4
Barrel %
16
6.1
Hard-Hit %
17
35.9
Sweet-Spot %
38
35.3
Bat Speed
Avg
11
67.4
Median
10
68.7
90th %
8
73.3
Plate Discipline
Chase %
33
30.0
Whiff %
52
22.0
K %
51
20.2
BB %
34
7.4
Swing Decisions

Plate Discipline · Decision+

Expected-run-value of every swing-or-take decision, against a league-average batter’s optimum. 100 = avg · 110 = 1 SD better.

Decision+
98
≈ 43th pctl
Chase cost
-32.4r
306 swings @ bad pitch
Passive cost
-12.6r
247 takes @ hittable pitch
Swing rate
49.8%
1,738 pitches seen
Runs per 100
-2.59
lg avg -2.53
Count
View
2+29%7+42%12+0%1253+42%12+30%23+3%39+0%34+16%32+50%165+50%24-5%39-32%59-32%73-24%46+31%39+31%13+44%16+2%47-33%48-24%58-10%48+34%32+25%12+8%12+37%19+7%29+14%28+12%253+0%10+17%652+29%7+14%71CATCHER'S VIEW
Judgment — swing% vs optimal
−35%−15%0+15%+35%
  • Red cells — swings more than an optimal batter would here (chasing).
  • Blue cells — swings less than optimal (too passive).
  • Number in cell: swing%-delta vs optimal. Top-right: pitches seen.
Total pitches shown: 1,000