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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
491
H
101
HR
13
AVG
.220
xwOBA
.282
PPG
1.53
Career Seasons
YrGPAAVGOBPSLGISOxwOBAK%BB%K-BB%HRSBPtsPPGxPPG
20262893.238.304.500.262.29517.2%8.6%8.6%50612.18—
2025125435.212
2024 MLB Percentiles

Hitting Profile

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

Expected Results
xwOBA
3
.282
xBA
10
.230
.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
10
.370
Quality of Contact
Avg EV
31
88.4
Median EV
29
91.2
90th % EV
19
102.7
Barrel %
19
5.9
Hard-Hit %
19
36.4
Sweet-Spot %
10
31.3
Bat Speed
Avg
23
68.5
Median
19
69.6
90th %
22
74.7
Plate Discipline
Chase %
22
32.1
Whiff %
77
17.9
K %
65
18.3
BB %
9
5.3
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+
99
≈ 47th pctl
Chase cost
-35.7r
347 swings @ bad pitch
Passive cost
-9.9r
188 takes @ hittable pitch
Swing rate
54.3%
1,790 pitches seen
Runs per 100
-2.55
lg avg -2.53
Count
View
25+29%7+25%8+0%11+0%72+11%9+35%20+25%32+24%46+42%24+21%19+0%11+57%28+10%48-14%58-23%69-17%54+50%28+40%15+63%16-3%30-16%69-18%55-9%44+61%33+0%9+17%6+26%27+9%23+24%34+70%20+33%12+33%6325+17%6+14%72CATCHER'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