Mithrandir Metrics
WSH 2026-07-08 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-07-08

Keibert Ruiz

WSH · Hitter · bats L · age 28
IN · 9 Negative regression Neutral
MatchupWSH vs HOUSpencer Arrighetti
Sample1917.0career MLB AB
PROPS 3 available PERCENTILES 25 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 11.9
F 14.9
V 11.9
Model 15.7% Market 9.8% Gap +5.5pp
DraftKings 880 tracking Open board
Total Bases 0.5
P 45.3
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 45.3% Market 69.2% Gap +8.9pp
FanDuel 130 tracking Open board
Hits 0.5
P 18.3
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 18.3% Market -- Gap +8.5pp
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%4.2%
37
Exit velocity88.4
53
Hard-hit%39.0%
49 +32 vs proj
xBA0.273
11
xSLG0.426
21
xwOBA0.280
23
BB%3.7%
7
Bat speed65.7
10
K%11.7%
96
Defense · percentile strip
Blocking Runs0.8 · C
82
Catcher Throwing-0.4 · C
40
Framing Runs2.8 · C
82
Pop Time2.0 · C
3
Baserunning · percentile strip
Base Running Runs-3.0 · C
2
Sprint Speed25.3 · C
9
Mithrandir+ · percentile strip
Avoids Bad ChasesST 61.5%
Small sample
Avoids Bad TakesHPT 30.9%
Small sample
Correct Decisions62.4%
Small sample
Resists Breaking - horizontalwOBA 0.298 · small sample
small sample
Resists Breaking - verticalwOBA 0.263 · thin sample
thin sample
Resists ChangeupwOBA 0.290
Small sample
Resists Cutters + splitterswOBA 0.368 · thin sample
thin sample
Resists FastballwOBA 0.345
Small sample
Resists SinkerwOBA 0.343
Small sample
SEAGER+ Plate Discipline92
Small sample

Context

projection · regression · matchup
Projected range0.279 to 0.352
RegressionNegative · -0.074
Opposing pitcherSpencer Arrighetti
EnvironmentNeutral
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)