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

Carlos Narváez

BOS · Hitter
IN · 8 Positive regression Hitter-Friendly
MatchupBOS vs SEAGeorge Kirby
Sample638.0career MLB AB
PROPS 1 available PERCENTILES 25 rows LINEUPS confirmed artifact NO PROSE templated rows only
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 props · all markets for this player
Home Run --
Home Run · tracking

No production board publishes this player-market cell today.

Total Bases 0.5
P 54.0
F -- in progress
V -- in progress
INSUFFICIENT LANES
Model 64.4% Market 65.5% Gap +11.5pp
BetMGM -190 tracking Open board
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%4.0%
36 -21 vs proj
Exit velocity87.2
43
Hard-hit%38.9%
52 -27 vs proj
xBA0.313
43
xSLG0.501
51
xwOBA0.263
15 -26 vs proj
BB%6.6%
30 -19 vs proj
Bat speed69.0
42
K%32.7%
8 -27 vs proj
Defense · percentile strip
Blocking Runs2.2 · C
95
Catcher Throwing-0.4 · C
43
Framing Runs1.8 · C
71
Pop Time2.0 · C
30
Baserunning · percentile strip
Sprint Speed25.2 · C
7
SB Success Rate100.0% · C
Small sample
Mithrandir+ · percentile strip
Avoids Bad ChasesST 62.8%
Small sample
Avoids Bad TakesHPT 27.4%
Small sample
Correct Decisions66.5%
Small sample
Resists Breaking - horizontalwOBA 0.262 · small sample
small sample
Resists Breaking - verticalwOBA 0.302 · thin sample
thin sample
Resists ChangeupwOBA 0.276
Small sample
Resists Cutters + splitterswOBA 0.327 · thin sample
thin sample
Resists FastballwOBA 0.284
Small sample
Resists SinkerwOBA 0.346
Small sample
SEAGER+ Plate Discipline96
Small sample

Context

projection · regression · matchup
Projected range--
RegressionPositive · 0.010
Opposing pitcherGeorge Kirby
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)