Mithrandir Metrics
Player Chicago Cubs Refreshed Sep 26 06:00 AM ET
Player profile / Chicago Cubs

Jacob Webb

P · Bats/Throws R/R · 6' 2", 210 lb · Age 33

Cards
0
Modules
0
Live Δ
yes
Club Chicago Cubs Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024253.02600256.2581.18
2025543.00550166.0581.03
2026653.41670966.0721.27
7 Seasons23193.08314016319.03161.22
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.

2026-09-26
56
Pitching
percentile
Pitching9 metrics
52
Arsenal5 metrics
79
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-26
ERA preseason3.77
ERA current pace3.48
ERA rolling p503.61
Observed weight55%
ERA
2.26 2.90 3.61 4.32 4.96
FIP
3.52 3.90 4.33 4.75 5.14
K%
20.7% 22.2% 23.9% 25.6% 27.2%
BB%
6.8% 7.7% 8.7% 9.8% 10.7%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-26
Pitching · percentile strip
WHIP1.34
48
ERA3.48
70
BB%8.6%
54
K%25.0%
70 +16 vs proj
xwOBA allowed0.322
39 -17 vs proj
Barrel allowed8.9%
26 -27 vs proj
Fastball velo94.2
46
Hard-hit allowed43.2%
18
Whiff%31.4%
95 +35 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-09-26
Changeup Stuff+111
97
Fastball Stuff+104
63
Mithrandir Stuff+105
81
Curveball Stuff+104
81
Slider Stuff+104
72
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 Webb, Jacob · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.322 2026-09-12: 0.3192026-09-13: 0.3182026-09-14: 0.3182026-09-18: 0.3242026-09-19: 0.3242026-09-20: 0.3242026-09-21: 0.3242026-09-22: 0.3242026-09-23: 0.3242026-09-24: 0.3222026-09-25: 0.3222026-09-26: 0.322 2026-09-12 2026-09-26 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 43%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 Webb, Jacob · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 49%49%Whiff: 31%31%Called strike: 16%16%First pitch strike: 56%56%Hard hit allowed: 43%43% 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 Webb, Jacob · 2026 arsenal snapshot 4-Seam Fastball: 42.9%Changeup: 38.7%Slider: 8.2%Curveball: 7.3%Sweeper: 2.9% FF43% · 94 mphprimary pitch FF 43%CH 39%SL 8%CU 7%ST 3% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Webb, Jacob · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 43% usage, 1″ horizontal break, 15″ drop, 94.2 mphFF94 mphChangeup: 39% usage, 10″ horizontal break, 29″ drop, 85.6 mphCH86 mphSlider: 8% usage, 1″ horizontal break, 39″ drop, 85.7 mphSL86 mphCurveball: 7% usage, 4″ horizontal break, 53″ drop, 81.8 mphCU82 mphSweeper: 3% usage, 6″ horizontal break, 41″ drop, 82.5 mphST83 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 45.5% 345 104 qualified
CH 39.2% 297 111 qualified
SL 7.9% 60 104 limited sample
CB 7.4% 56 104 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' 2"
Weight210 lb
Debut2019-04-16
Live layer

Delta / regression

ERA Δ-0.11
K% Δ+0.023

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.8σ gap
wOBA-against (actual)0.345
xwOBA-against (deserved)0.322

Webb’s wOBA-against sits at 0.345, but the quality of contact underneath says it should be 0.322 — a gap of 0.023, 0.8 standard deviations from the MLB norm over 66 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
No Mithrandir card history is available for this player yet.
Projection links / recent games

Available detail

Pitcher Projections 202622.7% K | 3.59 ERAProjection
2026-04-17 vs NYM1 ER / 1 K1.0 IP
2026-04-14 @ PHI1 ER / 0 K0.1 IP
2026-04-13 @ PHI0 ER / 1 K0.2 IP
2026-04-11 vs PIT0 ER / 2 K1.0 IP
2026-04-07 @ TB0 ER / 1 K1.0 IP