Mithrandir Metrics
Player Athletics Refreshed Jul 17 06:00 AM ET
Player profile / Athletics

Jeffrey Springs

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

Cards
20
Modules
1
Live Δ
yes
Club Athletics Position P Roster profile Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024223.2777033.0371.36
202511114.1132300171.01381.21
2026396.081919097.2841.42
9 Seasons37324.05196862582.15811.27
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.

2026-07-17
32
Pitching
percentile
Pitching9 metrics
35
Arsenal5 metrics
35
Rolling projection

Preseason / current pace / Bayesian update

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

2026-07-17
ERA preseason4.26
ERA current pace6.08
ERA rolling p505.46
Observed weight66%
ERA
4.21 4.80 5.46 6.12 6.71
FIP
4.61 4.98 5.38 5.78 6.15
K%
17.6% 18.8% 20.1% 21.3% 22.5%
BB%
6.8% 7.5% 8.3% 9.0% 9.7%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-17
Pitching · percentile strip
WHIP1.40
34
ERA6.08
10
BB%8.7%
49 -21 vs proj
K%20.0%
33
xwOBA allowed0.330
33
Barrel allowed9.3%
26
Fastball velo91.4
10
Hard-hit allowed33.9%
83
Whiff%21.5%
38
Mithrandir+

Stuff+ and arsenal context

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

2026-07-17
Changeup Stuff+103
57
Fastball Stuff+98
22
Mithrandir Stuff+100
32
Slider Stuff+104
66
Cutter Stuff+87
0
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 0.330 2026-07-06: 0.3312026-07-07: 0.3312026-07-08: 0.3312026-07-09: 0.3312026-07-10: 0.3302026-07-11: 0.3302026-07-12: 0.3302026-07-13: 0.3302026-07-14: 0.3302026-07-15: 0.3302026-07-16: 0.3302026-07-17: 0.330 2026-07-06 2026-07-17 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: 38%38%Zone: 47%47%Whiff: 22%22%Called strike: 17%17%First pitch strike: 47%47%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%Slider: 25.0%Changeup: 22.5%Sweeper: 6.4%Cutter: 2.2% FF44% · 91 mphprimary pitch FF 44%SL 25%CH 22%ST 6%FC 2% 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 mphSlider: 25% usage, 0″ horizontal break, 37″ drop, 83.9 mphSL84 mphChangeup: 22% usage, 12″ horizontal break, 36″ drop, 79.5 mphCH79 mphSweeper: 6% usage, 4″ horizontal break, 48″ drop, 76.8 mphST77 mphCutter: 2% usage, 1″ horizontal break, 25″ drop, 88.5 mphFC89 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 43.9% 504 98 qualified
SL 31.4% 360 104 qualified
CH 22.3% 256 103 qualified
FC 2.4% 28 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+1.32
K% Δ-0.011

positive regression

Regression watch

Unlucky so far. Better days ahead.

2.2σ gap
wOBA-against (actual)0.389
xwOBA-against (deserved)0.330

Springs’s wOBA-against sits at 0.389, but the quality of contact underneath says it should be 0.330 — a gap of 0.059, 2.2 standard deviations from the MLB norm over 103 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
Pitching202026-07-08Four-Seam Fastball played up through CH/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202621.1% K | 4.76 ERAProjection