Mithrandir Metrics
SEA 2026-08-31 Refreshed Aug 31 06:00 AM ET
Section III · Betting · Pitcher detail · 2026-08-31

George Kirby

SEA · SP · throws R · age 28
Projected starter Opp K 23.5% Hitter-Friendly
MatchupSEA vs BOSopponent
Sample785.333career MLB IP
PROPS 2 available BATTERS FACED 0.00 PERCENTILES 10 rows
Strikeouts · Palantir calibration review Last 14d ECE 0.061, 14d stable. This flags probability calibration, not a blanket model failure.
Strikeouts · Valinor calibration review Last 14d ECE 0.077, 14d error rising. This flags probability calibration, not a blanket model failure.
Total Bases · Palantir calibration review Last 14d ECE 0.045, 14d error rising. This flags probability calibration, not a blanket model failure.
Pitcher Outs · Palantir calibration review Last 14d ECE 0.077, 14d error rising. This flags probability calibration, not a blanket model failure.
Tonight's pitcher props
Strikeouts4.5
P 59.5
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 59.5% Market -- Gap +9.5pp
FanDuel -113 tracking Open board
Pitcher Outs17.5
P 49.5
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 49.5% Market 50.5% Gap +2.5pp
FanDuel -102 tracking Open board
Win Probability--
Win prob · no production board

No production board publishes this pitcher-market cell today.

Pitcher skill · percentile strip

Current season percentiles

100th = best in MLB
Pitching · percentile strip
WHIP1.37
42
ERA4.18
45
BB%5.6%
92
K%20.2%
37 -28 vs proj
xwOBA allowed0.305
61
Barrel allowed6.6%
63 +27 vs proj
Fastball velo96.8
83
Hard-hit allowed42.4%
23
Whiff%21.2%
36 -16 vs proj
Mithrandir+ · percentile strip
Mithrandir Stuff+107
91

Matchup context

cached artifacts
Projected range20.1% to 31.1%
Opponent K23.5%
Expected BF0.00
EnvironmentHitter-Friendly
Lane calibration receipts
Lane Health 2026-08-31
Palantir 17748 props Brier 0.118 ECE 0.008 14d stable
Fangorn 17748 props Brier 0.118 ECE 0.009 14d stable
Valinor 12111 props Brier 0.112 ECE 0.005 14d stable
Palantir 1556 props Brier 0.248 ECE 0.005 14d stable
Fangorn 53 props Brier 0.257 ECE 0.119 sample building
Valinor 1052 props Brier 0.248 ECE 0.017 14d error rising
Palantir 8442 props Brier 0.238 ECE 0.048 14d error rising
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 663 props Brier 0.164 ECE 0.032 14d stable
Fangorn tracking in progress (0 logged)
Valinor tracking in progress (0 logged)
Palantir 870 props Brier 0.257 ECE 0.062 14d error rising
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)