Mithrandir Metrics
Player Athletics Refreshed Sep 3 06:00 AM ET
Player profile / Athletics

Jeffrey Springs

P · Bats/Throws L/L · 6' 3", 218 lb · Age 33

Cards
26
Modules
1
Live Δ
yes
Club Athletics Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024223.2777033.0371.36
202511114.1132300171.01381.21
20263136.3725250123.0981.50
9 Seasons37364.19202922607.25951.29
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.

2026-09-03
25
Pitching
percentile
Pitching9 metrics
30
Arsenal5 metrics
36
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-03
ERA preseason4.26
ERA current pace6.37
ERA rolling p505.75
Observed weight71%
ERA
4.46 5.07 5.75 6.43 7.04
FIP
4.85 5.23 5.65 6.06 6.44
K%
16.7% 17.7% 18.9% 20.0% 21.0%
BB%
7.3% 8.0% 8.7% 9.4% 10.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-03
Pitching · percentile strip
WHIP1.48
23
ERA6.37
8
BB%9.1%
47 -24 vs proj
K%18.3%
22 -20 vs proj
xwOBA allowed0.339
24
Barrel allowed9.2%
24
Fastball velo91.4
9
Hard-hit allowed34.2%
80
Whiff%20.8%
33 -19 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-09-03
Changeup Stuff+103
59
Fastball Stuff+99
26
Mithrandir Stuff+100
31
Slider Stuff+103
61
Cutter Stuff+90
1
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 0.313 0.339 2026-08-23: 0.3402026-08-24: 0.3402026-08-25: 0.3402026-08-26: 0.3402026-08-27: 0.3402026-08-28: 0.3402026-08-29: 0.3402026-08-30: 0.3402026-08-31: 0.3392026-09-01: 0.3392026-09-02: 0.3392026-09-03: 0.339 2026-08-23 2026-09-03 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: 39%39%Zone: 46%46%Whiff: 21%21%Called strike: 16%16%First pitch strike: 48%48%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 Springs, Jeffrey · 2026 arsenal snapshot 4-Seam Fastball: 44.0%Changeup: 24.1%Slider: 23.2%Sweeper: 6.0%Cutter: 2.8% FF44% · 91 mphprimary pitch FF 44%CH 24%SL 23%ST 6%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 12″24″36″48″ 4-Seam Fastball: 44% usage, 4″ horizontal break, 16″ drop, 91.4 mphFF91 mphChangeup: 24% usage, 12″ horizontal break, 36″ drop, 79.5 mphCH79 mphSlider: 23% usage, 0″ horizontal break, 37″ drop, 84.1 mphSL84 mphSweeper: 6% usage, 4″ horizontal break, 46″ drop, 77.2 mphST77 mphCutter: 3% usage, 1″ horizontal break, 26″ drop, 88.0 mphFC88 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 43.9% 657 99 qualified
SL 28.4% 426 103 qualified
CH 24.2% 363 103 qualified
FC 3.5% 52 90 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+1.61
K% Δ-0.028

positive regression

Regression watch

Unlucky so far. Better days ahead.

2.2σ gap
wOBA-against (actual)0.395
xwOBA-against (deserved)0.339

Springs’s wOBA-against sits at 0.395, but the quality of contact underneath says it should be 0.339 — a gap of 0.055, 2.2 standard deviations from the MLB norm over 128 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching262026-08-30Command and chase profile drove the outing
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