Mithrandir Metrics
SF 2026-06-17 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-06-17

Rafael Devers

SF · Hitter · bats L · age 30
IN · 4 Negative regression Hitter-Friendly
MatchupSF vs ATLGrant Holmes
Sample4690.0career MLB AB
PROPS 3 available PERCENTILES 23 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 22.4
F 17.2
V 17.2
Model 23.4% Market 19.2% Gap +3.4pp
FanDuel 400 tracking Open board
Total Bases 0.5
P 41.8
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 41.8% Market 63.8% Gap +2.5pp
FanDuel 230 tracking Open board
Hits 1.5
P 21.3
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 21.3% Market -- Gap +5.0pp
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%6.3%
67 -23 vs proj
Exit velocity91.9
91
Hard-hit%49.7%
90
xBA0.325
54
xSLG0.595
73
xwOBA0.291
32 -55 vs proj
BB%7.3%
33 -50 vs proj
Bat speed70.4
63
K%30.2%
13 -23 vs proj
Defense · percentile strip
Outs Above Avg-2.0 · 1B
16
Range Runs-1.0 · 1B
39
Baserunning · percentile strip
Base Running Runs-1.1 · 1B
14
Sprint Speed26.1 · 1B
20
Mithrandir+ · percentile strip
Avoids Bad ChasesST 64.2%
43
Avoids Bad TakesHPT 25.0%
50
Correct Decisions67.3%
61
SEAGER+ Plate Discipline100
44
Resists Breaking - horizontalwOBA 0.273 · small sample
small sample
Resists Breaking - verticalwOBA 0.279 · thin sample
thin sample
Resists ChangeupwOBA 0.255
Small sample
Resists Cutters + splitterswOBA 0.378 · thin sample
thin sample
Resists FastballwOBA 0.315
Small sample
Resists SinkerwOBA 0.371
Small sample

Context

projection · regression · matchup
Projected range0.307 to 0.398
RegressionNegative · -0.026
Opposing pitcherGrant Holmes
EnvironmentHitter-Friendly
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)