Mithrandir Metrics
MIN 2026-08-17 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-08-17

Ryan Jeffers

MIN · Hitter · bats R · age 29
IN · 3 Negative regression Hitter-Friendly
MatchupMIN vs ATLMartín Pérez
Sample1849.0career MLB AB
PROPS 3 available PERCENTILES 24 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 12.8
F 13.1
V 11.6
Model 19.2% Market 12.5% Gap +6.3pp
DraftKings 675 tracking Open board
Total Bases 0.5
P 59.3
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 71.3% Market 72.2% Gap +12.9pp
BetMGM -260 tracking Open board
Hits 1.5
P 20.2
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 20.2% Market -- Gap +7.6pp
FanDuel 260 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%8.1%
87 +26 vs proj
Exit velocity88.9
61
Hard-hit%39.7%
55
xBA0.320
51
xSLG0.562
68
xwOBA0.365
94 +27 vs proj
BB%12.6%
88 +33 vs proj
Bat speed70.8
70
K%15.8%
85 +23 vs proj
Defense · percentile strip
Blocking Runs0.4 · C
72
Catcher Throwing-2.5 · C
5
Framing Runs0.6 · C
63
Pop Time2.0 · C
41
Baserunning · percentile strip
Sprint Speed26.4 · C
25
Mithrandir+ · percentile strip
Avoids Bad ChasesST 72.6%
Small sample
Avoids Bad TakesHPT 27.7%
Small sample
Correct Decisions66.7%
Small sample
Resists Breaking - horizontalwOBA 0.318 · small sample
small sample
Resists Breaking - verticalwOBA 0.281 · thin sample
thin sample
Resists ChangeupwOBA 0.285
Small sample
Resists Cutters + splitterswOBA 0.357 · thin sample
thin sample
Resists FastballwOBA 0.320
Small sample
Resists SinkerwOBA 0.431
Small sample
SEAGER+ Plate Discipline105
Small sample

Context

projection · regression · matchup
Projected range0.291 to 0.362
RegressionNegative · -0.057
Opposing pitcherMartín Pérez
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)