Mithrandir Metrics
KC 2026-07-19 Refreshed Jul 20 06:00 AM ET
Section III · Betting · Player detail · 2026-07-19

Michael Massey

KC · Hitter · bats L · age 28
IN · 8 Negative regression Neutral
MatchupKC vs SD--
Sample1430.0career MLB AB
PROPS 1 available PERCENTILES 26 rows LINEUPS confirmed artifact NO PROSE templated rows only
Palantir calibration review active Last 14d ECE 0.097, 14d error rising. This flags probability calibration, not a blanket model failure.
Valinor calibration review active Last 14d ECE 0.076, 14d stable. This flags probability calibration, not a blanket model failure.
Palantir calibration review active Last 14d ECE 0.065, 14d error rising. This flags probability calibration, not a blanket model failure.
Palantir calibration review active Last 14d ECE 0.082, 14d error rising. This flags probability calibration, not a blanket model failure.
Tonight's props · all markets for this player
Home Run --
Home Run · tracking

No production board publishes this player-market cell today.

Total Bases --
Total Bases · tracking

No production board publishes this player-market cell today.

Hits 0.5
P 98.0
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 98.0% Market -- Gap +35.0pp
FanDuel 250 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%5.2%
52
Exit velocity89.1
62
Hard-hit%41.5%
62 +19 vs proj
xBA0.303
29
xSLG0.510
50
xwOBA0.308
51
BB%5.6%
18
Bat speed69.9
53
K%16.7%
81
Defense · percentile strip
Arm Runs-0.1 · 2B
21
Arm Strength85.2 · 2B
36
Outs Above Avg8.0 · 2B
96
Range Runs5.7 · 2B
92
Baserunning · percentile strip
Base Running Runs-1.0 · 2B
18
Sprint Speed26.9 · 2B
37
SB Success Rate100.0% · 2B
Small sample
Mithrandir+ · percentile strip
Avoids Bad ChasesST 59.9%
Small sample
Avoids Bad TakesHPT 27.6%
Small sample
Correct Decisions62.8%
Small sample
Resists Breaking - horizontalwOBA 0.272 · small sample
small sample
Resists Breaking - verticalwOBA 0.301 · thin sample
thin sample
Resists ChangeupwOBA 0.297
Small sample
Resists Cutters + splitterswOBA 0.340 · thin sample
thin sample
Resists FastballwOBA 0.324
Small sample
Resists SinkerwOBA 0.357
Small sample
SEAGER+ Plate Discipline94
Small sample

Context

projection · regression · matchup
Projected range0.275 to 0.351
RegressionNegative · -0.014
Opposing pitcher--
EnvironmentNeutral
Lane calibration receipts
Lane Health 2026-07-20
Palantir 10059 props Brier 0.124 ECE 0.010 14d stable
Fangorn 10059 props Brier 0.124 ECE 0.011 14d stable
Valinor 4464 props Brier 0.118 ECE 0.006 14d stable
Palantir 860 props Brier 0.248 ECE 0.035 14d error rising
Fangorn 53 props Brier 0.257 ECE 0.119 sample building
Valinor 356 props Brier 0.249 ECE 0.041 14d stable
Palantir 4739 props Brier 0.240 ECE 0.076 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 288 props Brier 0.176 ECE 0.047 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 462 props Brier 0.260 ECE 0.055 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)