Mithrandir Metrics
Player Detroit Tigers Refreshed Jul 16 06:00 AM ET
Player profile / Detroit Tigers

Jack Flaherty

P · Bats/Throws R/R · 6' 4", 225 lb · Age 30

Cards
20
Modules
1
Live Δ
yes
Club Detroit Tigers Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
20241373.1728280162.01941.07
20258154.6431310161.01881.28
2026384.481818082.1981.41
10 Seasons66643.8520820201073.012281.21
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
44
Pitching
percentile
Pitching9 metrics
38
Arsenal6 metrics
15
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 preseason4.01
ERA current pace4.48
ERA rolling p504.31
Observed weight63%
ERA
3.09 3.67 4.31 4.95 5.53
FIP
3.22 3.56 3.95 4.34 4.68
K%
23.4% 24.7% 26.1% 27.4% 28.7%
BB%
7.9% 8.6% 9.4% 10.2% 10.9%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-16
Pitching · percentile strip
WHIP1.41
32
ERA4.48
39
BB%10.2%
32 -26 vs proj
K%26.0%
74
xwOBA allowed0.321
42
Barrel allowed9.0%
30
Fastball velo92.6
23
Hard-hit allowed47.1%
6
Whiff%24.5%
61
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
Curveball Stuff+99
10
Fastball Stuff+99
27
Mithrandir Stuff+97
17
Slider Stuff+100
34
Changeup Stuff+85
1
Sinker Stuff+88
2
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 Flaherty, Jack · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.321 2026-07-05: 0.3242026-07-06: 0.3212026-07-07: 0.3212026-07-08: 0.3212026-07-09: 0.3212026-07-10: 0.3212026-07-11: 0.3212026-07-12: 0.3222026-07-13: 0.3222026-07-14: 0.3222026-07-15: 0.3222026-07-16: 0.321 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.

5Pitches 2026Season 49%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 Flaherty, Jack · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 45%45%Whiff: 24%24%Called strike: 16%16%First pitch strike: 47%47%Hard hit allowed: 47%47% 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 Flaherty, Jack · 2026 arsenal snapshot 4-Seam Fastball: 48.9%Slider: 24.4%Knuckle Curve: 19.0%Sinker: 4.5%Changeup: 3.2% FF49% · 93 mphprimary pitch FF 49%SL 24%KC 19%SI 5%CH 3% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Flaherty, Jack · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 49% usage, 0″ horizontal break, 16″ drop, 92.8 mphFF93 mphSlider: 24% usage, 0″ horizontal break, 34″ drop, 85.1 mphSL85 mphKnuckle Curve: 19% usage, 0″ horizontal break, 54″ drop, 78.1 mphKC78 mphSinker: 5% usage, 3″ horizontal break, 24″ drop, 91.0 mphSI91 mphChangeup: 3% usage, 11″ horizontal break, 29″ drop, 85.6 mphCH86 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 49.5% 515 99 qualified
SL 24.8% 258 100 qualified
CB 19.7% 205 99 qualified
SI 4.0% 42 88 limited sample
CH 2.0% 21 85 limited sample
Method note

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

Reference layer

Current snapshot

Age30
Height6' 4"
Weight225 lb
Debut2017-09-01
Live layer

Delta / regression

ERA Δ+0.55
K% Δ+0.009

positive regression

Regression watch

Unlucky so far. Better days ahead.

2.3σ gap
wOBA-against (actual)0.383
xwOBA-against (deserved)0.321

Flaherty’s wOBA-against sits at 0.383, but the quality of contact underneath says it should be 0.321 — a gap of 0.062, 2.3 standard deviations from the MLB norm over 92 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
Pitching202026-07-10Four-Seam Fastball played up through FF/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202625.1% K | 3.93 ERAProjection
2026-04-20 @ BOS0 ER / 3 K3.1 IP
2026-04-15 vs KC1 ER / 7 K6.0 IP
2026-04-09 @ MIN1 ER / 6 K5.2 IP
2026-04-04 vs STL5 ER / 6 K4.0 IP