Mithrandir Metrics
Player Pittsburgh Pirates Refreshed Jun 2 06:00 AM ET
Player profile / Pittsburgh Pirates

Mason Montgomery

P profile with live context, projection links, and Mithrandir card history when available.

Cards
2
Modules
1
Live Δ
yes
Club Pittsburgh Pirates Position P Roster Active Status Healthy / active roster
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-02
ERA preseason4.06
ERA current pace3.48
ERA rolling p503.88
Observed weight30%
ERA
1.81 2.79 3.88 4.97 5.96
FIP
2.88 3.17 3.49 3.81 4.09
K%
24.5% 27.3% 30.4% 33.5% 36.3%
BB%
6.6% 8.5% 10.5% 12.5% 14.4%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-02
Pitching · percentile strip
BB%10.6%
27
Barrel allowed8.2%
44
Fastball velo98.3
96
Hard-hit allowed39.3%
49
K%30.8%
93
Whiff%33.3%
96
xwOBA allowed0.304
61
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; missing coverage is shown explicitly.

2026-06-02
Mithrandir Stuff+110
98
Rolling form chart

xwOBA allowed snapshot line

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

10 snapshots
Mithrandir Metrics ROLLING XWOBA LINE Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Rolling xwOBA allowed Montgomery, Mason · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 2026-05-23: 0.3232026-05-24: 0.3232026-05-25: 0.3102026-05-26: 0.3102026-05-28: 0.3102026-05-29: 0.3102026-05-30: 0.2982026-05-31: 0.2982026-06-01: 0.3042026-06-02: 0.304 2026-05-23 2026-06-02 xwOBA allowed MITHRANDIR · CHARTS
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.

5Pitches 2026Season 63%Top usage
ride armside gloveside +Arsenal gap +Shape contrast
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 Montgomery, Mason · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 48%48%Whiff: 33%33%Called strike: 14%14%First pitch strike: 56%56%Hard hit allowed: 39%39% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2026 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.

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Montgomery, Mason · 2026 arsenal snapshot 4-Seam Fastball: 63.2%Curveball: 18.2%Slider: 14.6%Changeup: 3.6%Sinker: 0.5% MIX FF 63%CU 18%SL 15%CH 4%SI 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Montgomery, Mason · 2026 arsenal snapshot FF: HB -0.1, IVB 0.8FFCU: HB 0.1, IVB 3.5CUSL: HB -0.0, IVB 2.7SLCH: HB -0.7, IVB 1.6CHSI: HB 0.1, IVB 0.9SI horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 66.0% 217 110 qualified
CB 17.0% 56 102 limited sample
SL 14.9% 49 108 limited sample
CH 1.5% 5 121 limited sample
SI 0.6% 2 111 limited sample
Method note

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

Reference layer

Current snapshot

Age25
Height6' 2"
Weight205 lb
Debut2024-09-05
Live layer

Delta / regression

ERA Δ-0.55
K% Δ+0.012
Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching22026-04-27Stuff and strike quality carried the outing
Projection links / recent games

Available detail

Pitcher Projections 202629.5% K | 4.03 ERAProjection
2026-04-17 vs TB0 ER / 2 K1.0 IP
2026-04-15 vs WSH0 ER / 1 K1.0 IP
2026-04-14 vs WSH0 ER / 2 K1.0 IP
2026-04-11 @ CHC0 ER / 2 K1.0 IP
2026-04-05 vs BAL1 ER / 3 K1.0 IP