Mithrandir Metrics
Pitcher projection 2026 Refreshed Jul 18 06:00 AM ET
Pitcher projection / MIA · 2026

Petersen, Michael

Run-prevention profile built on workable command

Primary
22.4% K%
Range
13.9% to 29.4%
Live Δ
yes
Team MIA Archetype Volatile contact Age 32 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.

2026-07-18
71
Pitching
percentile
Pitching9 metrics
61
Arsenal4 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.

2026-07-18
ERA preseason3.60
ERA current pace3.07
ERA rolling p503.38
Observed weight42%
ERA
1.75 2.52 3.38 4.23 5.00
FIP
2.75 3.19 3.68 4.17 4.61
K%
18.9% 21.2% 23.8% 26.3% 28.7%
BB%
6.8% 8.0% 9.3% 10.7% 11.9%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-07-18
Pitching · percentile strip
WHIP1.07
84
ERA3.07
74
BB%9.9%
34
K%28.7%
87 +38 vs proj
xwOBA allowed0.286
76 +39 vs proj
Barrel allowed11.9%
7 -37 vs proj
Fastball velo97.6
92
Hard-hit allowed43.6%
21
Whiff%25.5%
71 +26 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+.

2026-07-18
Fastball Stuff+109
91
Changeup Stuff+104
68
Mithrandir Stuff+108
93
Slider Stuff+104
64
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.

3Pitches 2026Season 60%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 Petersen, Michael · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.286 2026-07-07: 0.2932026-07-08: 0.2932026-07-09: 0.2892026-07-10: 0.2842026-07-11: 0.2842026-07-12: 0.2842026-07-13: 0.2842026-07-14: 0.2862026-07-15: 0.2862026-07-16: 0.2862026-07-17: 0.2862026-07-18: 0.286 2026-07-07 2026-07-18 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 Petersen, Michael · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 47%47%Whiff: 26%26%Called strike: 16%16%First pitch strike: 49%49%Hard hit allowed: 44%44% 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 Petersen, Michael · 2026 arsenal snapshot 4-Seam Fastball: 60.2%Slider: 27.1%Changeup: 12.7% FF60% · 98 mphprimary pitch FF 60%SL 27%CH 13% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Petersen, Michael · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 60% usage, 3″ horizontal break, 9″ drop, 97.6 mphFF98 mphSlider: 27% usage, 0″ horizontal break, 39″ drop, 86.6 mphSL87 mphChangeup: 13% usage, 5″ horizontal break, 27″ drop, 88.8 mphCH89 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 58.4% 239 109 qualified
SL 26.4% 108 104 limited sample
CH 15.2% 62 104 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
Needs the arsenal to hold up against lefties (0.306 vs 0.281 xwOBA allowed split).
2
templated note
Volume stays relief-shaped even when the bat-miss traits are strong.
3
templated note
Home park gives the run-prevention profile a small HR cushion.
4
templated note
Primary mix entering the season: 4-Seam Fastball 56%, Slider 41%, Sinker 2%.
Live context

Current-season signal

ERA Δ-0.81
K% Δ+0.063
Sample41.0 IP

negative regression

Projection table

Point projection and range

MetricPointRangeHalf-width
Innings32.0----
Batters Faced142----
K%22.4%13.9% to 29.4%+/- 7.8%
BB%9.5%5.6% to 13.4%+/- 3.9%
Whiff%22.5%14.6% to 28.5%+/- 6.9%
HR/91.260.55 to 2.09+/- 0.77
xwOBA Against0.3260.254 to 0.398+/- 0.072
Barrel% Allowed8.0%3.5% to 11.9%+/- 4.2%
ERA3.882.34 to 6.87+/- 2.27
FIP4.202.90 to 5.49+/- 1.30
WHIP1.3391.016 to 1.677+/- 0.331
Platoon / Shape
vs LHH

78 career BF

xwOBA0.306
K%15.4%
BB%9.3%
Barrel8.6%
vs RHH

95 career BF

xwOBA0.281
K%16.3%
BB%6.7%
Barrel6.3%