Mithrandir Metrics
STL 2026-06-18 Refreshed Sep 3 06:00 AM ET
Section III · Betting · Player detail · 2026-06-18

Iván Herrera

STL · Hitter · bats R · age 26
IN · 2 Negative regression Neutral
MatchupSTL vs KCNoah Cameron
Sample--career MLB AB
PROPS 1 available PERCENTILES 26 rows LINEUPS confirmed artifact NO PROSE templated rows only
Strikeouts · Valinor calibration review Last 14d ECE 0.053, 14d stable. This flags probability calibration, not a blanket model failure.
Total Bases · Palantir calibration review Last 14d ECE 0.043, 14d error rising. This flags probability calibration, not a blanket model failure.
Hits · Palantir calibration review Last 14d ECE 0.046, 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 23.4
F 17.9
V 17.9
Model 17.6% Market 13.1% Gap +4.0pp
FanDuel 635 tracking Open board
Total Bases --
Total Bases · tracking

No production board publishes this player-market cell today.

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%5.1%
50
Exit velocity89.6
65
Hard-hit%42.1%
62
xBA0.331
59
xSLG0.524
53
xwOBA0.369
91
BB%12.7%
85 +31 vs proj
Bat speed71.9
79
K%15.7%
84 +15 vs proj
Defense · percentile strip
Blocking Runs0.1 · C
58
Catcher Throwing-2.5 · C
3
Framing Runs0.4 · C
61
Pop Time2.0 · C
18
Baserunning · percentile strip
Base Running Runs-1.6 · DH
8
Sprint Speed25.8 · DH
16
SB Success Rate100.0% · DH
Small sample
Mithrandir+ · percentile strip
Avoids Bad ChasesST 70.0%
72
Avoids Bad TakesHPT 25.4%
47
Correct Decisions66.8%
56
SEAGER+ Plate Discipline104
69
Resists Breaking - horizontalwOBA 0.295 · small sample
small sample
Resists Breaking - verticalwOBA 0.285 · thin sample
thin sample
Resists ChangeupwOBA 0.318
Small sample
Resists Cutters + splitterswOBA 0.316 · thin sample
thin sample
Resists FastballwOBA 0.359
Small sample
Resists SinkerwOBA 0.386
Small sample

Context

projection · regression · matchup
Projected range0.324 to 0.383
RegressionNegative · -0.023
Opposing pitcherNoah Cameron
EnvironmentNeutral
Lane calibration receipts
Lane Health 2026-09-03
Palantir 18276 props Brier 0.117 ECE 0.008 14d stable
Fangorn 18276 props Brier 0.118 ECE 0.008 14d stable
Valinor 12618 props Brier 0.112 ECE 0.004 14d stable
Palantir 1610 props Brier 0.248 ECE 0.006 14d stable
Fangorn 53 props Brier 0.257 ECE 0.119 sample building
Valinor 1106 props Brier 0.248 ECE 0.013 14d stable
Palantir 8710 props Brier 0.238 ECE 0.047 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 690 props Brier 0.165 ECE 0.033 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 910 props Brier 0.256 ECE 0.058 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)