Mithrandir Metrics
SEA 2026-08-22 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-08-22

Josh Naylor

SEA · Hitter · bats L · age 29
IN · 5 Negative regression Neutral
MatchupSEA vs CHCDavid Peterson
Sample3057.0career MLB AB
PROPS 3 available PERCENTILES 24 rows LINEUPS confirmed artifact NO PROSE templated rows only
Strikeouts · Palantir calibration review Last 14d ECE 0.065, 14d stable. This flags probability calibration, not a blanket model failure.
Strikeouts · Valinor calibration review Last 14d ECE 0.079, 14d error rising. This flags probability calibration, not a blanket model failure.
Total Bases · Palantir calibration review Last 14d ECE 0.047, 14d error rising. This flags probability calibration, not a blanket model failure.
Pitcher Outs · Palantir calibration review Last 14d ECE 0.064, 14d stable. This flags probability calibration, not a blanket model failure.
Tonight's props · all markets for this player
Home Run 0.5
P 10.8
F 11.9
V 13.5
Model 15.3% Market 15.6% Gap -0.8pp
DraftKings 520 tracking Open board
Total Bases 0.5
P 64.3
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 77.7% Market 78.7% Gap +14.4pp
BetMGM -370 tracking Open board
Hits 0.5
P 25.2
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 25.2% Market -- Gap +1.8pp
FanDuel 310 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%3.7%
32 -25 vs proj
Exit velocity87.3
43
Hard-hit%36.6%
41 -20 vs proj
xBA0.321
52
xSLG0.461
33
xwOBA0.324
71
BB%7.6%
40
Bat speed68.0
29
K%12.7%
95
Defense · percentile strip
Outs Above Avg1.0 · 1B
71
Range Runs-0.0 · 1B
51
Baserunning · percentile strip
Base Running Runs-0.8 · 1B
27
SB Success Rate95.2% · 1B
85
Sprint Speed24.6 · 1B
3
Mithrandir+ · percentile strip
Avoids Bad ChasesST 58.7%
19
Avoids Bad TakesHPT 23.8%
64
Correct Decisions63.3%
24
SEAGER+ Plate Discipline96
26
Resists Breaking - horizontalwOBA 0.278 · small sample
small sample
Resists Breaking - verticalwOBA 0.257 · thin sample
thin sample
Resists ChangeupwOBA 0.272
Small sample
Resists Cutters + splitterswOBA 0.350 · thin sample
thin sample
Resists FastballwOBA 0.387
Small sample
Resists SinkerwOBA 0.338
Small sample

Context

projection · regression · matchup
Projected range0.279 to 0.366
RegressionNegative · -0.006
Opposing pitcherDavid Peterson
EnvironmentNeutral
Lane calibration receipts
Lane Health 2026-09-01
Palantir 17901 props Brier 0.117 ECE 0.008 14d stable
Fangorn 17901 props Brier 0.118 ECE 0.009 14d stable
Valinor 12243 props Brier 0.112 ECE 0.005 14d stable
Palantir 1577 props Brier 0.247 ECE 0.006 14d stable
Fangorn 53 props Brier 0.257 ECE 0.119 sample building
Valinor 1073 props Brier 0.247 ECE 0.016 14d error rising
Palantir 8544 props Brier 0.238 ECE 0.047 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 673 props Brier 0.163 ECE 0.031 14d stable
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 891 props Brier 0.256 ECE 0.060 14d stable
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)