Mithrandir Metrics
Pitcher projection 2026 Refreshed Sep 5 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.

2026-09-05
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.

2026-09-05
ERA preseason7.79
ERA current pace2.35
ERA rolling p504.83
Observed weight54%
ERA
2.35 3.52 4.83 6.13 7.31
FIP
2.20 2.67 3.20 3.73 4.21
K%
22.0% 24.1% 26.4% 28.7% 30.7%
BB%
5.3% 6.2% 7.2% 8.1% 9.0%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-09-05
Pitching · percentile strip
WHIP1.01
93
ERA2.35
92
BB%7.0%
77 +17 vs proj
K%31.0%
95 +62 vs proj
xwOBA allowed0.267
90 +51 vs proj
Barrel allowed6.9%
59 +26 vs proj
Fastball velo97.1
88
Hard-hit allowed36.2%
67
Whiff%27.3%
82 +32 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+.

2026-09-05
Fastball Stuff+105
68
Mithrandir Stuff+105
81
Slider Stuff+105
79
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 0.267 2026-08-25: 0.2652026-08-26: 0.2652026-08-27: 0.2682026-08-28: 0.2682026-08-29: 0.2682026-08-30: 0.2692026-08-31: 0.2692026-09-01: 0.2692026-09-02: 0.2692026-09-03: 0.2692026-09-04: 0.2692026-09-05: 0.267 2026-08-25 2026-09-05 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: 38%38%Zone: 51%51%Whiff: 27%27%Called strike: 15%15%First pitch strike: 52%52%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: 68.0%Slider: 23.9%Split-Finger: 7.4%Curveball: 0.7% FF68% · 97 mphprimary pitch FF 68%SL 24%FS 7%CU 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Fuentes, Didier · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 68% usage, 2″ horizontal break, 14″ drop, 97.1 mphFF97 mphSlider: 24% usage, 0″ horizontal break, 36″ drop, 85.7 mphSL86 mphSplit-Finger: 7% usage, 17″ horizontal break, 29″ drop, 89.0 mphFS89 mphCurveball: 1% usage, 7″ horizontal break, 47″ drop, 79.8 mphCU80 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 73.2% 478 105 qualified
SL 25.9% 169 105 limited sample
CB 0.9% 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-4.10
K% Δ+0.113
Sample71.3 IP

positive regression

Projection table

Point projection and range

MetricPointRangeHalf-width
Innings63.3----
Batters Faced320----
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%
ERA6.434.51 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%3.9%
Barrel8.0%