Mithrandir Metrics
Player Pittsburgh Pirates Refreshed Jun 12 06:00 AM ET
Player profile / Pittsburgh Pirates

Mason Montgomery

P · Bats/Throws L/L · 6' 2", 205 lb · Age 25

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

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024001.869009.2171.14
2025135.67570146.0631.65
2026114.56264025.2341.40
3 Seasons244.87924181.11141.51
At a glance

Season percentile report

The headline weighs outcome stats (xwOBA, barrels); each bar averages its full strip group below. 100 = best in MLB.

2026-06-12
43
Pitching
percentile
Pitching9 metrics
52
Arsenal4 metrics
82
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-12
ERA preseason4.06
ERA current pace4.94
ERA rolling p504.35
Observed weight33%
ERA
2.31 3.28 4.35 5.42 6.39
FIP
2.93 3.22 3.53 3.84 4.12
K%
24.5% 27.2% 30.2% 33.2% 35.9%
BB%
7.4% 9.2% 11.2% 13.2% 14.9%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-12
Pitching · percentile strip
WHIP1.39
34
ERA4.94
25
BB%12.6%
14 -16 vs proj
K%30.3%
92
xwOBA allowed0.311
52
Barrel allowed8.8%
36
Fastball velo98.2
96
Hard-hit allowed42.6%
29
Whiff%30.6%
91
Mithrandir+

Stuff+ and arsenal context

How nasty this pitcher's stuff grades in our pitch-level model. Missing coverage is shown explicitly.

2026-06-12
Fastball Stuff+110
95
Curveball Stuff+102
55
Mithrandir Stuff+110
98
Slider Stuff+106
79
Rolling form chart

xwOBA allowed snapshot line

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

12 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 0.311 2026-06-01: 0.3042026-06-02: 0.3042026-06-03: 0.3042026-06-04: 0.3042026-06-05: 0.3082026-06-06: 0.3082026-06-07: 0.3082026-06-08: 0.3112026-06-09: 0.3112026-06-10: 0.3112026-06-11: 0.3112026-06-12: 0.311 2026-06-01 2026-06-12 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: 36%36%Zone: 48%48%Whiff: 31%31%Called strike: 14%14%First pitch strike: 52%52%Hard hit allowed: 43%43% 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.

Watch the pitches in 3D →

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: 63.4%Curveball: 17.6%Slider: 13.5%Changeup: 5.1%Sinker: 0.4% FF63% · 98 mphprimary pitch FF 63%CU 18%SL 13%CH 5%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 12″24″36″48″ 4-Seam Fastball: 63% usage, 2″ horizontal break, 10″ drop, 98.2 mphFF98 mphCurveball: 18% usage, 1″ horizontal break, 43″ drop, 86.7 mphCU87 mphSlider: 13% usage, 0″ horizontal break, 33″ drop, 89.4 mphSL89 mphChangeup: 5% usage, 9″ horizontal break, 23″ drop, 90.4 mphCH90 mphSinker: 0% usage, 2″ horizontal break, 11″ drop, 98.9 mphSI99 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 66.9% 237 110 qualified
CB 16.1% 57 102 limited sample
SL 14.4% 51 106 limited sample
CH 2.0% 7 116 limited sample
SI 0.6% 2 112 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+0.91
K% Δ+0.007
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