Mithrandir Metrics
AZ 2026-08-27 Refreshed Sep 1 06:00 AM ET
Section III · Betting · Player detail · 2026-08-27

Geraldo Perdomo

AZ · Hitter · bats L · age 27
IN · 4 Negative regression Pitcher-Friendly
MatchupAZ vs SFLanden Roupp
Sample2268.0career MLB AB
PROPS 2 available PERCENTILES 22 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 9.1
F 11.7
V 8.6
Model 9.2% Market 9.5% Gap -0.6pp
FanDuel 915 tracking Open board
Total Bases 0.5
P 65.4
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 80.3% Market 81.3% Gap +15.9pp
BetMGM -435 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%2.1%
14 -15 vs proj
Exit velocity85.9
27
Hard-hit%30.6%
18
xBA0.300
28
xSLG0.407
16
xwOBA0.326
74
BB%14.0%
95
Bat speed63.6
4
K%12.3%
95
Defense · percentile strip
Arm Runs0.4 · SS
88
Arm Strength91.3 · SS
80
Outs Above Avg10.0 · SS
97
Range Runs7.8 · SS
95
Baserunning · percentile strip
Base Running Runs-0.3 · SS
38
SB Success Rate68.2% · SS
22
Sprint Speed27.0 · SS
39
Mithrandir+ · percentile strip
Resists FastballwOBA 0.369
11
Resists Breaking - horizontalwOBA 0.310 · small sample
small sample
Resists Breaking - verticalwOBA 0.286 · thin sample
thin sample
Resists ChangeupwOBA 0.262
Small sample
Resists Cutters + splitterswOBA 0.304 · thin sample
thin sample
Resists SinkerwOBA 0.340
Small sample

Context

projection · regression · matchup
Projected range0.303 to 0.369
RegressionNegative · -0.030
Opposing pitcherLanden Roupp
EnvironmentPitcher-Friendly
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)