Mithrandir Metrics
Pitcher projection 2026 Refreshed Sep 26 06:00 AM ET
Pitcher projection / ATL · 2026

Fuentes, Didier

Run-prevention profile built on workable command

Primary
19.8% K%
Range
11.1% to 28.2%
Live Δ
yes
Team ATL Archetype Volatile contact Age 21 Status Healthy / active roster
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
89
Pitching
percentile
Pitching9 metrics
82
Arsenal3 metrics
76
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 preseason7.78
ERA current pace2.27
ERA rolling p504.60
Observed weight58%
ERA
2.11 3.29 4.60 5.92 7.10
FIP
2.24 2.72 3.25 3.79 4.27
K%
22.5% 24.5% 26.6% 28.8% 30.7%
BB%
5.2% 6.1% 7.0% 7.9% 8.8%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-09-26
Pitching · percentile strip
WHIP1.04
91
ERA2.27
94
BB%6.7%
81 +21 vs proj
K%30.9%
95 +61 vs proj
xwOBA allowed0.275
86 +47 vs proj
Barrel allowed7.5%
48 +16 vs proj
Fastball velo97.2
89
Hard-hit allowed35.5%
73
Whiff%27.8%
85 +35 vs proj
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; Arsenal Decomposition remains descriptive support under Stuff+.

2026-09-26
Fastball Stuff+105
74
Mithrandir Stuff+106
82
Slider Stuff+104
73
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.

4Pitches 2026Season 68%Top usage
ride armside gloveside +Arsenal gap +Shape contrast
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 Fuentes, Didier · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.275 2026-09-12: 0.2682026-09-13: 0.2682026-09-14: 0.2682026-09-18: 0.2652026-09-19: 0.2662026-09-20: 0.2662026-09-21: 0.2662026-09-22: 0.2662026-09-23: 0.2662026-09-24: 0.2662026-09-25: 0.2662026-09-26: 0.275 2026-09-12 2026-09-26 xwOBA allowed MITHRANDIR · CHARTS
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 Fuentes, Didier · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 50%50%Whiff: 28%28%Called strike: 14%14%First pitch strike: 51%51%Hard hit allowed: 36%36% 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 Fuentes, Didier · 2026 arsenal snapshot 4-Seam Fastball: 67.9%Slider: 24.3%Split-Finger: 7.4%Curveball: 0.4% FF68% · 97 mphprimary pitch FF 68%SL 24%FS 7%CU 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Fuentes, Didier · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 68% usage, 2″ horizontal break, 14″ drop, 97.2 mphFF97 mphSlider: 24% usage, 1″ horizontal break, 36″ drop, 85.5 mphSL86 mphSplit-Finger: 7% usage, 17″ horizontal break, 29″ drop, 88.9 mphFS89 mphCurveball: 0% usage, 13″ horizontal break, 49″ drop, 78.9 mphCU79 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 72.8% 571 105 qualified
SL 26.4% 207 104 qualified
CB 0.8% 6 94 limited sample
Method note

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

Model read

Projection notes

1
templated note
Primary mix entering the season: 4-Seam Fastball 58%, Sweeper 27%, Curveball 12%.
pitcher
Live context

Current-season signal

ERA Δ-4.17
K% Δ+0.111
Sample80.7 IP

positive regression

Projection table

Point projection and range

MetricPointRangeHalf-width
Innings63.1----
Batters Faced319----
K%19.8%11.1% to 28.2%+/- 8.5%
BB%8.1%3.3% to 10.1%+/- 3.4%
Whiff%22.6%15.1% to 28.3%+/- 6.6%
HR/91.310.66 to 2.89+/- 1.12
xwOBA Against0.3220.237 to 0.354+/- 0.058
Barrel% Allowed8.6%5.1% to 11.7%+/- 3.3%
ERA6.444.51 to 11.50+/- 3.49
FIP4.413.37 to 6.21+/- 1.42
WHIP1.4301.133 to 1.807+/- 0.337
Platoon / Shape
vs LHH

31 career BF

xwOBA0.242
K%11.0%
BB%5.1%
Barrel7.6%
vs RHH

39 career BF

xwOBA0.230
K%12.3%
BB%4.0%
Barrel8.0%