Mithrandir Metrics
Player New York Mets Refreshed Jun 2 06:00 AM ET
Player profile / New York Mets

David Peterson

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

Cards
11
Modules
1
Live Δ
yes
Club New York Mets 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 preseason4.02
ERA current pace5.57
ERA rolling p504.89
Observed weight56%
ERA
3.75 4.29 4.89 5.49 6.03
FIP
2.82 3.13 3.47 3.81 4.12
K%
18.2% 19.4% 20.8% 22.1% 23.4%
BB%
7.3% 8.0% 8.8% 9.6% 10.3%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-02
Pitching · percentile strip
BB%8.8%
49
Barrel allowed4.8%
84 +31 vs proj
Fastball velo91.9
16
Hard-hit allowed43.8%
24
K%20.2%
34
Whiff%21.8%
40
xwOBA allowed0.329
38
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+101
37
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 Peterson, David · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 2026-05-19: 0.3282026-05-21: 0.3282026-05-23: 0.3322026-05-24: 0.3322026-05-25: 0.3322026-05-26: 0.3322026-05-28: 0.3362026-05-29: 0.3362026-05-30: 0.3362026-05-31: 0.3362026-06-01: 0.3292026-06-02: 0.329 2026-05-19 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 31%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 Peterson, David · Aggregate zone metrics; not pitch-by-pitch locations Edge: 39%39%Zone: 48%48%Whiff: 22%22%Called strike: 17%17%First pitch strike: 51%51%Hard hit allowed: 44%44% 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 Peterson, David · 2026 arsenal snapshot Sinker: 30.8%Slider: 23.6%4-Seam Fastball: 21.7%Curveball: 12.7%Changeup: 11.2% MIX SI 31%SL 24%FF 22%CU 13%CH 11% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Peterson, David · 2026 arsenal snapshot SI: HB -0.2, IVB 2.1SISL: HB -0.0, IVB 2.8SLFF: HB -0.2, IVB 1.6FFCU: HB 0.2, IVB 4.1CUCH: HB -1.0, IVB 2.8CH horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 30.0% 282 99 qualified
SL 23.9% 225 108 qualified
FB 22.3% 210 95 qualified
CB 13.0% 122 99 limited sample
CH 10.8% 102 105 limited sample
Method note

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

Reference layer

Current snapshot

Age30
Height6' 6"
Weight240 lb
Debut2020-07-28
Live layer

Delta / regression

ERA Δ+1.53
K% Δ-0.005

positive regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching112026-05-26Slider played up through SL/SI tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202620.7% K | 4.04 ERAProjection
2026-04-13 @ LAD4 ER / 7 K5.0 IP
2026-04-08 vs AZ5 ER / 6 K5.0 IP
2026-04-02 @ SF5 ER / 5 K4.1 IP