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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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Position cohort

Hitting value vs. OF peers

Rank #57 of 234

Each bar is one OF, ordered left-to-right by Value (blended). Center dot is VORP; whiskers span V⁻ → V⁺. This player is highlighted in blue.

-500+50+100+150+200Jakob Marsee
Jakob Marsee · #57
V⁻ -7VORP 8V⁺ 56
Jakob Marsee

Jakob Marsee

OF·MIA
Compare
Compare
PA
282
H
48
HR
3
AVG
.206
xwOBA
.306
PPG
1.84
Career Seasons
YrGPAAVGOBPSLGISOxwOBAK%BB%K-BB%HRSBPtsPPGxPPG
Proj78338.226.324.359.132.31222.0%11.5%10.5%7191602.05—
202667282.206
2026 MLB Percentiles

Hitting Profile

Expected Results
xwOBA
21
.306
xBA
9
.217
xSLG
.339
.305
.099
.306
22.7%
14.2%
8.5%
3
17
123
1.84
—
202556234.292.365.478.186.34820.5%9.4%11.1%5151532.73—
2
.306
Quality of Contact
Avg EV
9
85.5
Median EV
36
91.6
90th % EV
13
101.2
Barrel %
10
3.5
Hard-Hit %
17
35.7
Sweet-Spot %
26
33.3
Bat Speed
Avg
17
68.1
Median
26
70.1
90th %
21
74.2
Plate Discipline
Chase %
86
22.6
Whiff %
75
17.1
K %
36
22.7
BB %
88
14.2
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+
106
≈ 72th pctl
Chase cost
-5.0r
49 swings @ bad pitch
Passive cost
-4.3r
77 takes @ hittable pitch
Swing rate
38.6%
407 pitches seen
Runs per 100
-2.28
lg avg -2.53
Count
View
54+0%63252+14%14-20%15+0%12-12%17+0%72+25%12-5%21-46%28-43%28-48%25+17%12+0%6+0%7-28%18-24%29-22%23-13%15+88%815+33%9+33%9+33%6+40%10212221CATCHER'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: 407