Mithrandir Metrics
SF 2026-09-26 Refreshed Sep 26 06:00 AM ET
Section III · Betting · Player detail · 2026-09-26

Luis Arraez

SF · Hitter · bats L · age 29
IN · 1 Negative regression Pitcher-Friendly
MatchupSF vs LADBlake Snell
Sample3840.0career MLB AB
PROPS 2 available PERCENTILES 26 rows LINEUPS confirmed artifact NO PROSE templated rows only
Strikeouts · Palantir calibration review Last 14d ECE 0.055, 14d stable. This flags probability calibration, not a blanket model failure.
Hits · Palantir calibration review Last 14d ECE 0.082, 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 4.2
F 7.3
V 10.0
Model 5.5% Market 8.0% Gap -2.5pp
BetMGM 1150 tracking Open board
Total Bases 2.5
P 55.7
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 22.5% Market 23.5% Gap +32.1pp
BetMGM 325 tracking Open board
Hits --
Hits · tracking

No production board publishes this player-market cell today.

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%1.1%
3
Exit velocity85.7
26
Hard-hit%19.4%
2
xBA0.303
33
xSLG0.395
12
xwOBA0.307
55 -27 vs proj
BB%5.1%
15
Bat speed61.4
1
K%4.2%
100
Defense · percentile strip
Arm Runs0.3 · 2B
84
Arm Strength88.4 · 2B
59
Outs Above Avg12.0 · 2B
96
Range Runs9.6 · 2B
94
Baserunning · percentile strip
Base Running Runs1.2 · 2B
66
SB Success Rate87.5% · 2B
72
Sprint Speed26.8 · 2B
33
Mithrandir+ · percentile strip
Avoids Bad ChasesST 63.6%
41
Avoids Bad TakesHPT 29.8%
14
Correct Decisions65.2%
41
Resists FastballwOBA 0.329
68
SEAGER+ Plate Discipline95
22
Resists Breaking - horizontalwOBA 0.288 · small sample
small sample
Resists Breaking - verticalwOBA 0.320 · thin sample
thin sample
Resists ChangeupwOBA 0.274
Small sample
Resists Cutters + splitterswOBA 0.320 · thin sample
thin sample
Resists SinkerwOBA 0.361
Small sample

Context

projection · regression · matchup
Projected range0.303 to 0.378
RegressionNegative · -0.037
Opposing pitcherBlake Snell
EnvironmentPitcher-Friendly
Lane calibration receipts
Lane Health 2026-09-26
Palantir 21711 props Brier 0.118 ECE 0.004 14d stable
Fangorn 21711 props Brier 0.118 ECE 0.005 14d stable
Valinor 16023 props Brier 0.114 ECE 0.001 14d stable
Palantir 1947 props Brier 0.248 ECE 0.011 14d stable
Fangorn 53 props Brier 0.257 ECE 0.119 sample building
Valinor 1443 props Brier 0.248 ECE 0.008 14d stable
Palantir 10429 props Brier 0.238 ECE 0.039 14d stable
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 850 props Brier 0.166 ECE 0.036 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 1088 props Brier 0.255 ECE 0.053 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)