Mithrandir Metrics
Player Miami Marlins Refreshed Sep 29 06:00 AM ET
Player profile / Miami Marlins

Michael Petersen

P · Bats/Throws R/R · 6' 7", 195 lb · Age 32

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

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024315.95160019.2141.63
2025004.00150018.0171.39
2026443.02650165.2811.13
3 Seasons753.759601103.11121.27
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.

2026-09-29
70
Pitching
percentile
Pitching9 metrics
60
Arsenal4 metrics
83
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-29
ERA preseason3.60
ERA current pace3.08
ERA rolling p503.32
Observed weight54%
ERA
1.71 2.47 3.32 4.17 4.93
FIP
2.57 3.01 3.49 3.97 4.41
K%
21.2% 23.1% 25.2% 27.4% 29.3%
BB%
7.9% 8.9% 10.1% 11.3% 12.3%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-29
Pitching · percentile strip
WHIP1.18
75
ERA3.08
81
BB%11.2%
24 -19 vs proj
K%29.5%
91 +39 vs proj
xwOBA allowed0.287
79 +46 vs proj
Barrel allowed12.1%
3 -36 vs proj
Fastball velo98.0
94
Hard-hit allowed42.7%
21
Whiff%25.7%
73 +24 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-09-29
Fastball Stuff+110
95
Mithrandir Stuff+109
96
Changeup Stuff+104
69
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 Petersen, Michael · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.287 2026-09-18: 0.2872026-09-19: 0.2872026-09-20: 0.2872026-09-21: 0.2852026-09-22: 0.2852026-09-23: 0.2852026-09-24: 0.2842026-09-25: 0.2842026-09-26: 0.2842026-09-27: 0.2842026-09-28: 0.2872026-09-29: 0.287 2026-09-18 2026-09-29 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.

4Pitches 2026Season 61%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 Petersen, Michael · Aggregate zone metrics; not pitch-by-pitch locations Edge: 35%35%Zone: 47%47%Whiff: 26%26%Called strike: 14%14%First pitch strike: 54%54%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 Petersen, Michael · 2026 arsenal snapshot 4-Seam Fastball: 61.3%Slider: 26.7%Changeup: 11.8%Sinker: 0.2% FF61% · 98 mphprimary pitch FF 61%SL 27%CH 12%SI 0% 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: 61% usage, 2″ horizontal break, 9″ drop, 98.0 mphFF98 mphSlider: 27% usage, 0″ horizontal break, 37″ drop, 87.7 mphSL88 mphChangeup: 12% usage, 5″ horizontal break, 26″ drop, 89.7 mphCH90 mphSinker: 0% usage, 10″ horizontal break, 10″ drop, 98.0 mphSI98 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 60.0% 388 110 qualified
SL 26.6% 172 104 limited sample
CH 13.4% 87 104 limited sample
Method note

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

Reference layer

Current snapshot

Age32
Height6' 7"
Weight195 lb
Debut2024-06-18
Live layer

Delta / regression

ERA Δ-0.80
K% Δ+0.071

negative regression

Regression watch

Running hot. Expect some cooling.

-0.0σ gap
wOBA-against (actual)0.286
xwOBA-against (deserved)0.287

Petersen’s wOBA-against sits at 0.286, but the quality of contact underneath says it should be 0.287 — a gap of 0.001, -0.0 standard deviations from the MLB norm over 65 IP. The results have outrun the underlying process; as the sample grows, expect the numbers to drift back toward the deserved level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
No Mithrandir card history is available for this player yet.
Projection links / recent games

Available detail

Pitcher Projections 202622.4% K | 3.88 ERAProjection
2026-08-15 @ CIN0 ER / 1 K1.0 IP
2026-04-14 @ ATL0 ER / 1 K2.0 IP
2026-04-11 @ DET0 ER / 0 K1.0 IP
2026-04-08 vs CIN0 ER / 2 K1.0 IP
2026-04-04 @ NYY2 ER / 0 K1.0 IP