Mithrandir Metrics
Player Seattle Mariners Refreshed Jul 16 06:00 AM ET
Player profile / Seattle Mariners

Cooper Criswell

P · Bats/Throws R/R · 6' 6", 200 lb · Age 29

Cards
3
Modules
1
Live Δ
yes
Club Seattle Mariners Position P Roster Injured 60-Day Status IL-60
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024654.082618099.1731.35
2025103.5771117.291.58
2026213.52260130.2231.17
6 Seasons1084.3271212185.11361.39
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.

2026-07-16
64
Pitching
percentile
Pitching9 metrics
56
Arsenal6 metrics
72
Rolling projection

Preseason / current pace / Bayesian update

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

2026-07-16
ERA preseason4.17
ERA current pace3.52
ERA rolling p503.93
Observed weight37%
ERA
2.68 3.27 3.93 4.58 5.17
FIP
2.96 3.39 3.86 4.34 4.77
K%
15.3% 16.9% 18.7% 20.4% 22.0%
BB%
4.9% 5.8% 6.8% 7.7% 8.6%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-16
Pitching · percentile strip
WHIP1.29
55
ERA3.52
62
BB%5.6%
91 +21 vs proj
K%20.3%
35 +20 vs proj
xwOBA allowed0.286
77 +27 vs proj
Barrel allowed4.8%
87 +32 vs proj
Fastball velo91.0
6
Hard-hit allowed37.5%
60
Whiff%20.4%
28 +22 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-07-16
Changeup Stuff+109
91
Cutter Stuff+100
35
Fastball Stuff+101
43
Mithrandir Stuff+107
86
Sinker Stuff+106
83
Slider Stuff+110
95
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 Criswell, Cooper · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.286 2026-07-05: 0.2862026-07-06: 0.2862026-07-07: 0.2862026-07-08: 0.2862026-07-09: 0.2862026-07-10: 0.2862026-07-11: 0.2862026-07-12: 0.2862026-07-13: 0.2862026-07-14: 0.2862026-07-15: 0.2862026-07-16: 0.286 2026-07-05 2026-07-16 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.

6Pitches 2026Season 27%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 Criswell, Cooper · Aggregate zone metrics; not pitch-by-pitch locations Edge: 40%40%Zone: 46%46%Whiff: 20%20%Called strike: 17%17%First pitch strike: 55%55%Hard hit allowed: 38%38% 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 Criswell, Cooper · 2026 arsenal snapshot Changeup: 27.0%Sinker: 25.1%Cutter: 23.9%Sweeper: 18.2%4-Seam Fastball: 5.1%Slurve: 0.7% CH27% · 85 mphprimary pitch CH 27%SI 25%FC 24%ST 18%FF 5%SV 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Criswell, Cooper · 2026 arsenal snapshot 12″24″36″48″ Changeup: 27% usage, 5″ horizontal break, 44″ drop, 85.4 mphCH85 mphSinker: 25% usage, 2″ horizontal break, 37″ drop, 91.0 mphSI91 mphCutter: 24% usage, 0″ horizontal break, 30″ drop, 87.2 mphFC87 mphSweeper: 18% usage, 4″ horizontal break, 38″ drop, 78.6 mphST79 mph4-Seam Fastball: 5% usage, 1″ horizontal break, 23″ drop, 91.0 mphFF91 mphSlurve: 1% usage, 0″ horizontal break, 43″ drop, 82.1 mphSV82 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CH 27.4% 104 109 limited sample
SI 26.9% 102 106 limited sample
SL 19.3% 73 110 limited sample
FC 19.3% 73 100 limited sample
FB 7.1% 27 101 limited sample
Method note

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

Reference layer

Current snapshot

Age29
Height6' 6"
Weight200 lb
Debut2021-08-27
Live layer

Delta / regression

ERA Δ-0.66
K% Δ+0.030

positive regression

Regression watch

Unlucky so far. Better days ahead.

2.8σ gap
wOBA-against (actual)0.388
xwOBA-against (deserved)0.286

Criswell’s wOBA-against sits at 0.388, but the quality of contact underneath says it should be 0.286 — a gap of 0.102, 2.8 standard deviations from the MLB norm over 34 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching32026-03-17Cutter played up through CH/ST tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202617.3% K | 4.18 ERAProjection
2026-05-20 vs CWS0 ER / 1 K1.0 IP
2026-04-20 vs ATH0 ER / 0 K1.0 IP
2026-04-12 vs HOU0 ER / 1 K1.0 IP
2026-04-06 @ TEX0 ER / 0 K1.0 IP
2026-04-01 vs NYY1 ER / 1 K2.0 IP