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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
502
H
118
HR
18
AVG
.258
xwOBA
.327
PPG
2.25
Career Seasons
YrGPAAVGOBPSLGISOxwOBAK%BB%K-BB%HRSBPtsPPGxPPG
20262786.205.271.436.231.28617.4%8.1%9.3%40592.19—
2025125435.212
2023 MLB Percentiles

Hitting Profile

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

Expected Results
xwOBA
37
.327
xBA
43
.251
.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
47
.436
Quality of Contact
Avg EV
41
89.2
Median EV
50
92.2
90th % EV
27
104.0
Barrel %
41
8.0
Hard-Hit %
25
38.5
Sweet-Spot %
54
36.8
Bat Speed
Avg
11
66.8
Median
12
68.2
90th %
9
73.0
Plate Discipline
Chase %
32
30.3
Whiff %
58
20.6
K %
59
19.1
BB %
36
8.0
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+
104
≈ 66th pctl
Chase cost
-41.3r
431 swings @ bad pitch
Passive cost
-12.9r
249 takes @ hittable pitch
Swing rate
52.4%
2,267 pitches seen
Runs per 100
-2.39
lg avg -2.54
Count
View
2+17%65+0%10+0%814+33%6+7%14+13%23+23%39+16%38+21%19+9%11+54%13+4%51-26%65-26%57-16%49+47%43+29%21+35%23+5%37-19%42-20%55-13%60+58%43+30%20+22%9+30%23+11%27+14%22+50%10+45%20+0%62+0%7+13%8+0%9+0%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