Mithrandir Metrics
SD 2026-05-23 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-05-23

Fernando Tatis Jr.

SD · Hitter · bats R · age 27
IN · 1 Positive regression Neutral
MatchupSD vs ATHJ.t. Ginn
Sample2786.0career MLB AB
PROPS 1 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 16.3
F 17.9
V 13.5
Model 19.2% Market 16.4% Gap +2.1pp
FanDuel 485 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%6.8%
73
Exit velocity90.8
79
Hard-hit%54.7%
97
xBA0.369
85
xSLG0.536
57
xwOBA0.340
75
BB%10.9%
72
Bat speed72.1
81
K%24.1%
37 -21 vs proj
Defense · percentile strip
Arm Runs0.2 · RF
57
Arm Strength100.8 · RF
95
Outs Above Avg0.0 · RF
46
Range Runs3.8 · RF
89
Baserunning · percentile strip
Base Running Runs-0.2 · RF
32
Bolts3.0 · RF
45
SB Success Rate70.0% · RF
24
Sprint Speed28.6 · RF
87
Mithrandir+ · percentile strip
Avoids Bad ChasesST 55.6%
Small sample
Avoids Bad TakesHPT 16.7%
Small sample
Correct Decisions54.5%
Small sample
Resists ChangeupwOBA 0.166
Small sample
Resists FastballwOBA 0.361
Small sample
SEAGER+ Plate Discipline101
Small sample

Context

projection · regression · matchup
Projected range0.337 to 0.417
RegressionPositive · 0.029
Opposing pitcherJ.t. Ginn
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)