Mithrandir Metrics
Pitcher projection 2026 Refreshed Jun 1 06:00 AM ET
Pitcher projection / ATH · 2026

Barnett, Mason

Run-prevention profile built on workable command

Primary
22.1% K%
Range
13.0% to 27.0%
Live Δ
--
Team ATH Archetype Volatile contact Age 26 Status Out / inactive
Rolling projection

Preseason / current pace / Bayesian update

Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.

2026-06-01
ERA preseason4.44
ERA current pace0.00
ERA rolling p504.28
Observed weight4%
ERA
2.60 3.40 4.28 5.17 5.97
FIP
3.25 3.77 4.34 4.91 5.43
K%
12.4% 15.6% 19.2% 22.7% 25.9%
BB%
6.4% 7.7% 9.2% 10.7% 12.0%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-06-01
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; Arsenal Decomposition remains descriptive support under Stuff+.

2026-06-01
Mithrandir Stuff+89
7
Optimization map

Arsenal optimization map

Pitch-shape context from this pitcher’s current arsenal snapshot. Hover a pitch to inspect usage, movement, and bat-missing context.

4Pitches 2025Season 53%Top usage
ride armside gloveside +Arsenal gap +Shape contrast
Rolling form chart

xwOBA allowed snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

0 snapshots
No chart yet

No Live State xwOBA snapshots are available for this player.

Zone profile

Aggregate zone heatmap

Aggregate zone metrics from seasonal Statcast leaderboards.

Mithrandir Metrics ZONE HEATMAP Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Pitch Zone Profile Barnett, Mason · Aggregate zone metrics; not pitch-by-pitch locations Edge: 23%23%Zone: 35%35%Whiff: 17%17%Called strike: 7%7%First pitch strike: 56%56%Hard hit allowed: 33%33% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2025 pitch-level arsenal aggregates; current season takes over after 100 tracked pitches across at least 2 pitch types. Descriptive pitch-type Stuff+ composition. Not a promoted predictive metric.

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Barnett, Mason · 2025 arsenal snapshot 4-Seam Fastball: 53.4%Sweeper: 21.3%Curveball: 15.1%Changeup: 10.2% MIX FF 53%ST 21%CU 15%CH 10% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Barnett, Mason · 2025 arsenal snapshot FF: HB 0.0, IVB 1.3FFST: HB -0.5, IVB 3.0STCU: HB -0.1, IVB 5.1CUCH: HB -0.3, IVB 3.1CH horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SL 46.5% 20 97 limited sample
FB 37.2% 16 80 limited sample
CB 14.0% 6 109 limited sample
CH 2.3% 1 68 limited sample
Method note

Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.

Model read

Projection notes

1
templated note
Primary mix entering the season: 4-Seam Fastball 53%, Sweeper 21%, Curveball 15%.
pitcher
Live context

Current-season signal

No Live State delta is available for this player yet.

Projection table

Point projection and range

MetricPointRangeHalf-width
Innings63.4----
Batters Faced290----
K%22.1%13.0% to 27.0%+/- 7.0%
BB%9.2%5.9% to 11.6%+/- 2.8%
Whiff%22.1%15.6% to 26.2%+/- 5.3%
HR/91.500.49 to 1.87+/- 0.69
xwOBA Against0.3190.240 to 0.346+/- 0.053
Barrel% Allowed8.7%6.1% to 12.4%+/- 3.1%
ERA4.913.36 to 6.86+/- 1.75
FIP4.312.96 to 5.21+/- 1.13
WHIP1.3991.093 to 1.732+/- 0.319
Platoon / Shape
vs LHH

42 career BF

xwOBA0.218
K%13.1%
BB%8.4%
Barrel7.7%
vs RHH

62 career BF

xwOBA0.213
K%14.5%
BB%6.4%
Barrel8.8%