Mithrandir Metrics
DET 2026-08-08 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-08-08

Zach McKinstry

DET · Hitter · bats L · age 31
IN · 9 Negative regression Neutral
MatchupDET vs SFLanden Roupp
Sample1820.0career MLB AB
PROPS 3 available PERCENTILES 26 rows LINEUPS confirmed artifact NO PROSE templated rows only
Strikeouts · Palantir calibration review Last 14d ECE 0.053, 14d stable. This flags probability calibration, not a blanket model failure.
Strikeouts · Valinor calibration review Last 14d ECE 0.068, 14d stable. This flags probability calibration, not a blanket model failure.
Total Bases · Palantir calibration review Last 14d ECE 0.053, 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 10.5
F 13.0
V 9.3
Model 10.7% Market 8.7% Gap +1.6pp
DraftKings 1010 tracking Open board
Total Bases 0.5
P 57.9
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 69.4% Market 70.6% Gap +12.7pp
BetMGM -240 tracking Open board
Hits 1.5
P 21.0
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 21.0% Market -- Gap +1.7pp
FanDuel 340 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%1.8%
11 -25 vs proj
Exit velocity84.5
14
Hard-hit%22.9%
5 -20 vs proj
xBA0.296
24
xSLG0.401
13
xwOBA0.292
34 -22 vs proj
BB%9.0%
57
Bat speed66.3
14
K%15.7%
86 +29 vs proj
Defense · percentile strip
Arm Runs-0.9 · 2B
5
Arm Strength96.6 · 2B
97
Outs Above Avg3.0 · 2B
83
Range Runs4.2 · 2B
85
Baserunning · percentile strip
Base Running Runs-2.2 · 2B
8
Sprint Speed27.9 · 2B
64
SB Success Rate25.0% · 2B
Small sample
Mithrandir+ · percentile strip
Avoids Bad ChasesST 67.4%
Small sample
Avoids Bad TakesHPT 28.1%
Small sample
Correct Decisions68.2%
Small sample
Resists Breaking - horizontalwOBA 0.290 · small sample
small sample
Resists Breaking - verticalwOBA 0.282 · thin sample
thin sample
Resists ChangeupwOBA 0.273
Small sample
Resists Cutters + splitterswOBA 0.320 · thin sample
thin sample
Resists FastballwOBA 0.319
Small sample
Resists SinkerwOBA 0.360
Small sample
SEAGER+ Plate Discipline100
Small sample

Context

projection · regression · matchup
Projected range0.282 to 0.346
RegressionNegative · -0.040
Opposing pitcherLanden Roupp
EnvironmentNeutral
Lane calibration receipts
Lane Health 2026-09-02
Palantir 18081 props Brier 0.118 ECE 0.008 14d stable
Fangorn 18081 props Brier 0.118 ECE 0.009 14d stable
Valinor 12423 props Brier 0.112 ECE 0.004 14d stable
Palantir 1591 props Brier 0.247 ECE 0.006 14d stable
Fangorn 53 props Brier 0.257 ECE 0.119 sample building
Valinor 1087 props Brier 0.248 ECE 0.016 14d stable
Palantir 8613 props Brier 0.238 ECE 0.047 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 683 props Brier 0.163 ECE 0.031 14d stable
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 900 props Brier 0.256 ECE 0.059 14d error falling
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)