Mithrandir Metrics
Player Athletics Refreshed Jun 1 06:00 AM ET
Player profile / Athletics

Jeffrey Springs

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

Cards
17
Modules
1
Live Δ
yes
Club Athletics 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 preseason4.26
ERA current pace4.07
ERA rolling p504.15
Observed weight56%
ERA
2.95 3.52 4.15 4.79 5.36
FIP
3.75 4.10 4.49 4.88 5.23
K%
17.9% 19.3% 20.8% 22.3% 23.7%
BB%
5.9% 6.7% 7.5% 8.3% 9.1%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%7.5%
68
Barrel allowed8.3%
41
Fastball velo91.3
11
Hard-hit allowed32.4%
85
K%21.2%
42
Whiff%22.3%
45
xwOBA allowed0.311
52 +19 vs proj
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+100
31
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 Springs, Jeffrey · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.3022026-05-19: 0.3012026-05-21: 0.3012026-05-23: 0.3092026-05-24: 0.3092026-05-25: 0.3092026-05-26: 0.3092026-05-28: 0.3102026-05-29: 0.3112026-05-30: 0.3112026-05-31: 0.3112026-06-01: 0.311 2026-05-17 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.

5Pitches 2026Season 44%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 Springs, Jeffrey · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 49%49%Whiff: 22%22%Called strike: 18%18%First pitch strike: 53%53%Hard hit allowed: 32%32% 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 Springs, Jeffrey · 2026 arsenal snapshot 4-Seam Fastball: 43.9%Slider: 23.7%Changeup: 22.0%Sweeper: 7.4%Cutter: 3.0% MIX FF 44%SL 24%CH 22%ST 7%FC 3% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Springs, Jeffrey · 2026 arsenal snapshot FF: HB -0.4, IVB 1.3FFSL: HB 0.0, IVB 3.2SLCH: HB -1.0, IVB 3.0CHST: HB 0.6, IVB 4.1STFC: HB -0.1, IVB 2.0FC horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 43.5% 459 98 qualified
SL 31.6% 334 105 qualified
CH 22.4% 237 103 qualified
FC 2.5% 26 87 limited sample
Method note

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

Reference layer

Current snapshot

Age33
Height6' 3"
Weight218 lb
Debut2018-07-31
Live layer

Delta / regression

ERA Δ-0.69
K% Δ+0.001

positive regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching172026-05-274-Seam Fastball played up through SL/CH tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202621.1% K | 4.76 ERAProjection
2026-04-14 vs TEX1 ER / 5 K6.1 IP
2026-04-09 @ NYY0 ER / 6 K7.0 IP
2026-04-03 vs HOU1 ER / 7 K6.0 IP