Mithrandir Metrics
MIA 2026-07-27 Refreshed Jul 27 06:00 AM ET
Section III · Betting · Player detail · 2026-07-27

Jakob Marsee

MIA · Hitter · bats L · age 25
IN · 9 Positive regression Neutral
MatchupMIA vs PHIZack Wheeler
Sample553.0career MLB AB
PROPS 3 available PERCENTILES 26 rows LINEUPS confirmed artifact NO PROSE templated rows only
Strikeouts · Palantir calibration review Last 14d ECE 0.074, 14d error rising. This flags probability calibration, not a blanket model failure.
Strikeouts · Valinor calibration review Last 14d ECE 0.072, 14d error rising. This flags probability calibration, not a blanket model failure.
Total Bases · Palantir calibration review Last 14d ECE 0.057, 14d error rising. This flags probability calibration, not a blanket model failure.
Hits · Palantir calibration review Last 14d ECE 0.087, 14d error rising. This flags probability calibration, not a blanket model failure.
Pitcher Outs · Palantir calibration review Last 14d ECE 0.140, 14d error rising. This flags probability calibration, not a blanket model failure.
Tonight's props · all markets for this player
Home Run 0.5
P 10.7
F 12.2
V 12.4
Model 13.5% Market 10.1% Gap +3.0pp
DraftKings 855 tracking Open board
Total Bases 0.5
P 59.9
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 72.0% Market 73.0% Gap +13.1pp
BetMGM -270 tracking Open board
Hits 0.5
P 18.2
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 18.2% Market -- Gap +5.7pp
FanDuel 600 tracking Open board
RBI --
RBI · no production board

No production board publishes this player-market cell today.

Underlying skill · actual percentile with projection tick

Percentile strip

100th = best in MLB
Hitting · percentile strip
Barrel%1.9%
11 -39 vs proj
Exit velocity85.2
19
Hard-hit%33.6%
27 -17 vs proj
xBA0.297
24
xSLG0.420
19
xwOBA0.298
41
BB%12.4%
87 +48 vs proj
Bat speed67.3
23
K%22.4%
51
Defense · percentile strip
Arm Runs-1.7 · CF
12
Arm Strength95.0 · CF
65
Outs Above Avg5.0 · CF
96
Range Runs4.5 · CF
89
Baserunning · percentile strip
Base Running Runs-0.4 · CF
34
SB Success Rate61.1% · CF
15
Sprint Speed27.8 · CF
61
Mithrandir+ · percentile strip
Avoids Bad ChasesST 72.9%
88
Avoids Bad TakesHPT 26.9%
34
Correct Decisions67.7%
65
Resists FastballwOBA 0.295
99
SEAGER+ Plate Discipline106
76
Resists Breaking - horizontalwOBA 0.275 · small sample
small sample
Resists Breaking - verticalwOBA 0.294 · thin sample
thin sample
Resists ChangeupwOBA 0.289
Small sample
Resists Cutters + splitterswOBA 0.337 · thin sample
thin sample
Resists SinkerwOBA 0.338
Small sample

Context

projection · regression · matchup
Projected range0.259 to 0.368
RegressionPositive · 0.005
Opposing pitcherZack Wheeler
EnvironmentNeutral
Lane calibration receipts
Lane Health 2026-07-27
Palantir 11499 props Brier 0.122 ECE 0.011 14d stable
Fangorn 11499 props Brier 0.122 ECE 0.010 14d stable
Valinor 5904 props Brier 0.116 ECE 0.006 14d stable
Palantir 964 props Brier 0.247 ECE 0.031 14d error rising
Fangorn 53 props Brier 0.257 ECE 0.119 sample building
Valinor 460 props Brier 0.247 ECE 0.038 14d error rising
Palantir 5326 props Brier 0.239 ECE 0.073 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 344 props Brier 0.177 ECE 0.049 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 512 props Brier 0.259 ECE 0.056 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir tracking in progress (0 logged)
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)