Mithrandir Metrics
ATL 2026-09-01 Refreshed Sep 2 06:00 AM ET
Section III · Betting · Player detail · 2026-09-01

Austin Riley

ATL · Hitter · bats R · age 29
IN · 7 Negative regression Neutral
MatchupATL vs WSHJake Irvin
Sample3630.0career MLB AB
PROPS 3 available PERCENTILES 26 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 11.9
V 13.9
Model 20.3% Market 16.2% Gap +3.5pp
FanDuel 495 tracking Open board
Total Bases 0.5
P 63.5
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 78.7% Market 79.6% Gap +16.1pp
BetMGM -390 tracking Open board
Hits 0.5
P 26.5
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 26.5% Market -- Gap +0.9pp
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%7.5%
83
Exit velocity91.3
90
Hard-hit%45.0%
80
xBA0.329
62
xSLG0.607
81
xwOBA0.299
44
BB%7.8%
41
Bat speed73.9
94
K%30.8%
13
Defense · percentile strip
Arm Runs-0.0 · 3B
28
Arm Strength87.2 · 3B
50
Outs Above Avg-1.0 · 3B
28
Range Runs-0.5 · 3B
50
Baserunning · percentile strip
Base Running Runs0.9 · 3B
64
SB Success Rate100.0% · 3B
94
Sprint Speed27.9 · 3B
63
Mithrandir+ · percentile strip
Avoids Bad ChasesST 62.7%
37
Avoids Bad TakesHPT 25.5%
47
Correct Decisions64.3%
31
Resists FastballwOBA 0.318
86
SEAGER+ Plate Discipline98
36
Resists Breaking - horizontalwOBA 0.277 · small sample
small sample
Resists Breaking - verticalwOBA 0.272 · thin sample
thin sample
Resists ChangeupwOBA 0.263
Small sample
Resists Cutters + splitterswOBA 0.333 · thin sample
thin sample
Resists SinkerwOBA 0.366
Small sample

Context

projection · regression · matchup
Projected range0.297 to 0.382
RegressionNegative · -0.012
Opposing pitcherJake Irvin
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)