Mithrandir Metrics
COL 2026-08-28 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-08-28

Willi Castro

COL · Hitter · bats L · age 29
IN · 5 Negative regression Neutral
MatchupCOL vs ATLGrant Holmes
Sample2737.0career MLB AB
PROPS 3 available PERCENTILES 27 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 10.1
F 11.7
V 8.8
Model 15.1% Market 9.8% Gap +4.9pp
DraftKings 885 tracking Open board
Total Bases 0.5
P 57.0
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 68.3% Market 69.2% Gap +12.2pp
BetMGM -225 tracking Open board
Hits 1.5
P 19.8
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 19.8% Market -- Gap +6.5pp
FanDuel 280 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%5.4%
58
Exit velocity86.9
39
Hard-hit%41.3%
62 +19 vs proj
xBA0.337
71
xSLG0.563
70
xwOBA0.311
56 -19 vs proj
BB%8.5%
51
Bat speed70.9
71
K%26.6%
30
Defense · percentile strip
Arm Runs0.1 · 2B
57
Arm Strength92.9 · 2B
88
Outs Above Avg1.0 · 2B
72
Range Runs-3.9 · 2B
18
Baserunning · percentile strip
Base Running Runs0.8 · 2B
60
Bolts1.0 · 2B
12
SB Success Rate90.0% · 2B
80
Sprint Speed28.2 · 2B
72
Mithrandir+ · percentile strip
Avoids Bad ChasesST 59.0%
19
Avoids Bad TakesHPT 21.9%
79
Correct Decisions64.1%
30
SEAGER+ Plate Discipline98
35
Resists Breaking - horizontalwOBA 0.273 · small sample
small sample
Resists Breaking - verticalwOBA 0.273 · thin sample
thin sample
Resists ChangeupwOBA 0.269
Small sample
Resists Cutters + splitterswOBA 0.353 · thin sample
thin sample
Resists FastballwOBA 0.349
Small sample
Resists SinkerwOBA 0.339
Small sample

Context

projection · regression · matchup
Projected range0.304 to 0.377
RegressionNegative · -0.044
Opposing pitcherGrant Holmes
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)