Mithrandir Metrics
PIT 2026-08-18 Refreshed Sep 1 06:00 AM ET
Section III · Betting · Player detail · 2026-08-18

Spencer Horwitz

PIT · Hitter
IN · 1 Negative regression Neutral
MatchupPIT vs DETKeider Montero
Sample--career MLB AB
PROPS 3 available PERCENTILES 18 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 12.0
F 13.1
V 10.8
Model 16.7% Market 11.3% Gap +5.0pp
DraftKings 755 tracking Open board
Total Bases 0.5
P 56.7
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 67.8% Market 68.8% Gap +12.1pp
BetMGM -220 tracking Open board
Hits 1.5
P 18.5
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 18.5% Market -- Gap +10.9pp
FanDuel 240 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%5.3%
57
Exit velocity86.9
36
Hard-hit%31.4%
21
xBA0.275
12
xSLG0.445
28
xwOBA0.326
73
BB%12.8%
90 +25 vs proj
Bat speed67.4
24
K%14.0%
91
Defense · percentile strip
Outs Above Avg-4.0 · 1B
9
Range Runs-2.7 · 1B
26
Baserunning · percentile strip
Base Running Runs-1.7 · 1B
12
Sprint Speed24.8 · 1B
4
SB Success Rate100.0% · 1B
Small sample
Mithrandir+ · percentile strip
Avoids Bad ChasesST 72.0%
82
Avoids Bad TakesHPT 26.3%
38
Correct Decisions67.0%
61
SEAGER+ Plate Discipline106
75

Context

projection · regression · matchup
Projected range--
RegressionNegative · -0.039
Opposing pitcherKeider Montero
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)