Mithrandir Metrics
Player Boston Red Sox Refreshed Jun 15 06:00 AM ET
Player profile / Boston Red Sox

Greg Weissert

P · Bats/Throws R/R · 6' 2", 235 lb · Age 31

Cards
0
Modules
0
Live Δ
yes
Club Boston Red Sox Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024423.13620163.1581.34
2025662.82720467.0571.16
2026013.67290027.0281.33
5 Seasons1393.3419205188.21761.27
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.

2026-06-15
59
Pitching
percentile
Pitching9 metrics
59
Arsenal5 metrics
75
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-15
ERA preseason3.62
ERA current pace3.86
ERA rolling p503.70
Observed weight33%
ERA
2.33 2.98 3.70 4.42 5.07
FIP
3.34 3.74 4.19 4.63 5.03
K%
18.1% 20.1% 22.3% 24.5% 26.5%
BB%
5.8% 6.9% 8.2% 9.5% 10.6%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-15
Pitching · percentile strip
WHIP1.37
42
ERA3.86
52
BB%7.8%
66
K%24.1%
61 +19 vs proj
xwOBA allowed0.289
73
Barrel allowed5.2%
80 +31 vs proj
Fastball velo93.8
39
Hard-hit allowed33.8%
82
Whiff%21.1%
34
Mithrandir+

Stuff+ and arsenal context

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

2026-06-15
Changeup Stuff+106
72
Fastball Stuff+102
49
Mithrandir Stuff+107
86
Sinker Stuff+107
84
Slider Stuff+107
85
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 Weissert, Greg · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.289 2026-06-04: 0.2922026-06-05: 0.2922026-06-06: 0.2922026-06-07: 0.2922026-06-08: 0.2922026-06-09: 0.2922026-06-10: 0.2912026-06-11: 0.2912026-06-12: 0.2892026-06-13: 0.2892026-06-14: 0.2892026-06-15: 0.289 2026-06-04 2026-06-15 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.

6Pitches 2026Season 35%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 Weissert, Greg · Aggregate zone metrics; not pitch-by-pitch locations Edge: 42%42%Zone: 48%48%Whiff: 21%21%Called strike: 18%18%First pitch strike: 59%59%Hard hit allowed: 34%34% 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 Weissert, Greg · 2026 arsenal snapshot Sinker: 34.8%4-Seam Fastball: 28.8%Sweeper: 17.3%Changeup: 9.3%Slider: 7.4%Curveball: 2.4% SI35% · 94 mphprimary pitch SI 35%FF 29%ST 17%CH 9%SL 7%CU 2% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Weissert, Greg · 2026 arsenal snapshot 12″24″36″48″ Sinker: 35% usage, 12″ horizontal break, 28″ drop, 93.8 mphSI94 mph4-Seam Fastball: 29% usage, 2″ horizontal break, 19″ drop, 93.7 mphFF94 mphSweeper: 17% usage, 12″ horizontal break, 36″ drop, 81.5 mphST81 mphChangeup: 9% usage, 7″ horizontal break, 42″ drop, 85.3 mphCH85 mphSlider: 7% usage, 2″ horizontal break, 35″ drop, 85.1 mphSL85 mphCurveball: 2% usage, 7″ horizontal break, 48″ drop, 81.4 mphCU81 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 36.4% 138 107 limited sample
FB 27.4% 104 102 limited sample
SL 25.9% 98 107 limited sample
CH 8.2% 31 106 limited sample
CB 2.1% 8 96 limited sample
Method note

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

Reference layer

Current snapshot

Age31
Height6' 2"
Weight235 lb
Debut2022-08-25
Live layer

Delta / regression

ERA Δ-0.06
K% Δ+0.027
Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
No Mithrandir card history is available for this player yet.
Projection links / recent games

Available detail

Pitcher Projections 202621.4% K | 3.92 ERAProjection
2026-05-20 @ KC0 ER / 1 K1.1 IP
2026-04-20 vs DET0 ER / 3 K1.0 IP
2026-04-11 @ STL0 ER / 0 K0.2 IP
2026-04-08 vs MIL0 ER / 2 K0.2 IP
2026-04-05 vs SD2 ER / 3 K1.0 IP