Mithrandir Metrics
Player Boston Red Sox Refreshed Jun 1 06:00 AM ET
Player profile / Boston Red Sox

Greg Weissert

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

Cards
0
Modules
0
Live Δ
yes
Club Boston Red Sox 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.

2026-06-01
ERA preseason3.62
ERA current pace3.80
ERA rolling p503.68
Observed weight31%
ERA
2.29 2.95 3.68 4.41 5.06
FIP
3.45 3.86 4.31 4.76 5.16
K%
17.2% 19.2% 21.5% 23.7% 25.7%
BB%
5.7% 6.8% 8.1% 9.4% 10.6%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%7.5%
68
Barrel allowed5.4%
78 +27 vs proj
Fastball velo93.8
39
Hard-hit allowed33.8%
80
K%21.5%
44
Whiff%20.9%
32
xwOBA allowed0.305
59
Mithrandir+

Stuff+ and arsenal context

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

2026-06-01
Mithrandir Stuff+107
86
Rolling form chart

xwOBA allowed snapshot line

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

9 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 2026-05-23: 0.3042026-05-24: 0.3042026-05-25: 0.2972026-05-26: 0.2972026-05-28: 0.2972026-05-29: 0.2972026-05-30: 0.3112026-05-31: 0.3112026-06-01: 0.305 2026-05-23 2026-06-01 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: 57%57%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.

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Weissert, Greg · 2026 arsenal snapshot Sinker: 35.0%4-Seam Fastball: 28.1%Sweeper: 18.2%Changeup: 9.1%Slider: 7.2%Curveball: 2.4% MIX SI 35%FF 28%ST 18%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 SI: HB 1.0, IVB 2.3SIFF: HB 0.2, IVB 1.6FFST: HB -1.0, IVB 3.0STCH: HB -0.6, IVB 3.5CHSL: HB -0.2, IVB 2.9SLCU: HB 0.5, IVB 4.0CU horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 36.4% 138 106 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 93 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-0.12
K% Δ+0.001
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