Mithrandir Metrics
Pitcher projection 2026 Refreshed Sep 27 06:00 AM ET
Pitcher projection / PHI · 2026

Kerkering, Orion

Late-inning arm with usable miss-bat shape

Primary
25.2% K%
Range
19.5% to 35.8%
Live Δ
yes
Team PHI Archetype Balanced reliever 2 Age 25 Status Out / inactive
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.

2026-09-27
38
Pitching
percentile
Pitching9 metrics
54
Arsenal4 metrics
71
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-27
ERA preseason3.38
ERA current pace4.97
ERA rolling p504.22
Observed weight53%
ERA
2.70 3.42 4.22 5.02 5.74
FIP
2.75 3.19 3.67 4.15 4.59
K%
20.3% 22.3% 24.5% 26.7% 28.7%
BB%
8.4% 9.5% 10.7% 11.9% 13.0%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-09-27
Pitching · percentile strip
WHIP1.47
25
ERA4.97
26
BB%12.5%
14 -36 vs proj
K%23.5%
61
xwOBA allowed0.303
63
Barrel allowed6.6%
64
Fastball velo96.8
86
Hard-hit allowed32.5%
89
Whiff%23.9%
60
Mithrandir+

Stuff+ and arsenal context

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

2026-09-27
Mithrandir Stuff+106
86
Slider Stuff+109
95
Fastball Stuff+103
56
Sinker Stuff+102
48
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 42%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 Kerkering, Orion · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.303 2026-09-13: 0.2932026-09-14: 0.2932026-09-18: 0.2932026-09-19: 0.2982026-09-20: 0.2982026-09-21: 0.3032026-09-22: 0.3032026-09-23: 0.3032026-09-24: 0.3032026-09-25: 0.3032026-09-26: 0.3032026-09-27: 0.303 2026-09-13 2026-09-27 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 Kerkering, Orion · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 46%46%Whiff: 24%24%Called strike: 19%19%First pitch strike: 53%53%Hard hit allowed: 33%33% 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 Kerkering, Orion · 2026 arsenal snapshot Sweeper: 42.0%4-Seam Fastball: 34.1%Sinker: 18.0%Split-Finger: 5.9% ST42% · 87 mphprimary pitch ST 42%FF 34%SI 18%FS 6% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Kerkering, Orion · 2026 arsenal snapshot 12″24″36″48″ Sweeper: 42% usage, 2″ horizontal break, 37″ drop, 87.0 mphST87 mph4-Seam Fastball: 34% usage, 5″ horizontal break, 13″ drop, 97.1 mphFF97 mphSinker: 18% usage, 14″ horizontal break, 19″ drop, 96.3 mphSI96 mphSplit-Finger: 6% usage, 13″ horizontal break, 25″ drop, 92.2 mphFS92 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SL 46.5% 280 109 qualified
FB 32.2% 194 103 limited sample
SI 21.3% 128 102 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
Volume stays relief-shaped even when the bat-miss traits are strong.
2
templated note
Home park slightly inflates the home-run risk band.
3
templated note
Primary mix entering the season: Sweeper 48%, 4-Seam Fastball 33%, Sinker 19%.
Live context

Current-season signal

ERA Δ+1.05
K% Δ-0.017
Sample58.3 IP

positive regression

Projection table

Point projection and range

MetricPointRangeHalf-width
Innings38.4----
Batters Faced166----
K%25.2%19.5% to 35.8%+/- 8.2%
BB%8.8%4.9% to 12.8%+/- 3.9%
Whiff%23.9%19.1% to 31.0%+/- 6.0%
HR/91.160.43 to 1.77+/- 0.67
xwOBA Against0.3130.231 to 0.338+/- 0.054
Barrel% Allowed7.2%4.1% to 11.1%+/- 3.5%
ERA3.921.18 to 5.47+/- 2.14
FIP3.541.85 to 4.44+/- 1.30
WHIP1.3071.010 to 1.687+/- 0.338
Platoon / Shape
vs LHH

249 career BF

xwOBA0.286
K%25.3%
BB%9.5%
Barrel6.5%
vs RHH

360 career BF

xwOBA0.275
K%25.2%
BB%7.1%
Barrel6.9%