Mithrandir Metrics
STL 2026-07-17 Refreshed Jul 17 06:00 AM ET
Section III · Betting · Player detail · 2026-07-17

Iván Herrera

STL · Hitter · bats R · age 26
IN · 2 Negative regression Neutral
MatchupSTL vs AZMerrill Kelly
Sample1018.0career MLB AB
PROPS 2 available PERCENTILES 26 rows LINEUPS confirmed artifact NO PROSE templated rows only
Tonight's props · all markets for this player
Home Run 0.5
P 18.6
F 14.7
V 13.3
Model 15.8% Market 12.6% Gap +2.9pp
DraftKings 670 tracking Open board
Total Bases 0.5
P 63.3
F 63.9 EXPERIMENTAL
V 62.9 EXPERIMENTAL
FULL
Model 72.2% Market 73.3% Gap +10.1pp
BetMGM -275 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%4.2%
37 -31 vs proj
Exit velocity89.1
61
Hard-hit%40.3%
56 -19 vs proj
xBA0.310
36
xSLG0.477
38
xwOBA0.345
83
BB%11.8%
83 +28 vs proj
Bat speed71.8
77
K%16.2%
83
Defense · percentile strip
Blocking Runs-0.2 · C
39
Catcher Throwing-3.2 · C
3
Framing Runs-0.2 · C
47
Pop Time2.0 · C
21
Baserunning · percentile strip
Base Running Runs-1.6 · DH
9
SB Success Rate100.0% · DH
93
Sprint Speed25.9 · DH
16
Mithrandir+ · percentile strip
Avoids Bad ChasesST 69.1%
69
Avoids Bad TakesHPT 26.0%
41
Correct Decisions66.1%
50
SEAGER+ Plate Discipline103
63
Resists Breaking - horizontalwOBA 0.295 · small sample
small sample
Resists Breaking - verticalwOBA 0.286 · thin sample
thin sample
Resists ChangeupwOBA 0.314
Small sample
Resists Cutters + splitterswOBA 0.308 · thin sample
thin sample
Resists FastballwOBA 0.360
Small sample
Resists SinkerwOBA 0.379
Small sample

Context

projection · regression · matchup
Projected range0.324 to 0.383
RegressionNegative · -0.022
Opposing pitcherMerrill Kelly
EnvironmentNeutral
Lane calibration receipts
Lane Health 2026-07-17
Palantir 9390 props Brier 0.124 ECE 0.010 14d stable
Fangorn 9390 props Brier 0.125 ECE 0.012 14d stable
Valinor 3795 props Brier 0.118 ECE 0.007 14d stable
Palantir 453 props Brier 0.245 ECE 0.004 sample building
Fangorn 18 props Brier 0.243 ECE 0.080 sample building
Valinor 32 props Brier 0.236 ECE 0.220 sample building
Palantir 3223 props Brier 0.240 ECE 0.103 sample building
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 137 props Brier 0.153 ECE 0.025 sample building
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 328 props Brier 0.265 ECE 0.083 sample building
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)