Mithrandir Metrics
Player Rochester Red Wings Refreshed Jul 18 06:00 AM ET
Player profile / Rochester Red Wings

Joey Wiemer

RF · Bats/Throws R/R · 6' 4", 226 lb · Age 27

Cards
1
Modules
1
Live Δ
yes
Club Rochester Red Wings Position RF Roster Reassigned to Minors Status Out / inactive
Traditional line

Season by season

3D Swing Sim Projections
PARHHRSBAVGOBPSLGOPS
2024282401.154.214.154.368
20256171330.236.279.436.715
202683162031.286.398.514.912
4 Seasons582731121913.216.296.380.676
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
67
Offense
percentile
Offense9 metrics
60
Defense1 metrics
22
Speed2 metrics
52
Plate skills13 metrics
34
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
xwOBA preseason0.304
xwOBA current pace0.315
xwOBA rolling p500.307
Observed weight32%
xwOBA
0.257 0.281 0.307 0.334 0.358
wOBA
0.444 0.475 0.508 0.541 0.571
ISO
0.140 0.167 0.198 0.229 0.257
K%
24.8% 27.4% 30.3% 33.2% 35.8%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-18
Hitting · percentile strip
Barrel%5.9%
64
Exit velocity88.6
56
Hard-hit%40.7%
58
xBA0.375
90
xSLG0.601
77
xwOBA0.315
59 +32 vs proj
BB%13.7%
92 +60 vs proj
Bat speed68.0
28
K%29.4%
17
Defense · percentile strip
Outs Above Avg-1.0 · RF
22
Arm Runs0.8 · RF
Small sample
Range Runs-0.6 · RF
Small sample
Baserunning · percentile strip
Bolts1.0 · RF
15
Sprint Speed28.9 · RF
89
SB Success Rate100.0% · RF
Small sample
Mithrandir+

Stuff+ and arsenal context

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

2026-07-18
Avoids Bad ChasesST 71.4% · rebadged research
80
Avoids Bad TakesHPT 27.5% · rebadged research
28
Correct Decisions66.3% · rebadged research
51
Fastball Stuff+77
0
Mithrandir Stuff+65
3
Resists Breaking - horizontalwOBA 0.279 · borderline
71
Resists Breaking - verticalwOBA 0.260 · insufficient sample
94
Resists ChangeupwOBA 0.312 · validated thin sample
5
Resists Cutters + splitterswOBA 0.371 · insufficient sample
4
Resists FastballwOBA 0.354 · validated
22
Resists SinkerwOBA 0.383 · validated
9
SEAGER+ Plate Discipline104
68
Slider Stuff+66
0
Rolling form chart

xwOBA 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 Wiemer, Joey · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.308 0.315 2026-07-07: 0.3152026-07-08: 0.3152026-07-09: 0.3152026-07-10: 0.3152026-07-11: 0.3152026-07-12: 0.3152026-07-13: 0.3152026-07-14: 0.3152026-07-15: 0.3152026-07-16: 0.3152026-07-17: 0.3152026-07-18: 0.315 2026-07-07 2026-07-18 xwOBA 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 51%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 Swing Zone Profile Wiemer, Joey · Aggregate zone metrics; not pitch-by-pitch locations Zone: 46%46%Chase: 26%26%Whiff: 28%28%Zone contact: 85%85%Contact: 72%72%Hard hit: 41%41% 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 Wiemer, Joey · 2026 arsenal snapshot Other: 51.2%Slider: 37.2%Curveball: 7.0%Changeup: 2.3%Eephus: 2.3% FA51% · 78 mphprimary pitch FA 51%SL 37%CU 7%CH 2%EP 2% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Wiemer, Joey · 2026 arsenal snapshot 6″12″18″24″ Other: 51% usage, 0″ horizontal break, 2″ drop, 78.2 mphFA78 mphSlider: 37% usage, 0″ horizontal break, 5″ drop, 61.9 mphSL62 mphCurveball: 7% usage, 0″ horizontal break, 19″ drop, 35.3 mphCU35 mphChangeup: 2% usage, 1″ horizontal break, 5″ drop, 68.2 mphCH68 mphEephus: 2% usage, 1″ horizontal break, 9″ drop, 47.1 mphEP47 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 52.4% 22 77 limited sample
SL 38.1% 16 66 limited sample
CB 7.1% 3 69 limited sample
CH 2.4% 1 55 limited sample
Method note

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

Reference layer

Current snapshot

Age27
Height6' 4"
Weight226 lb
Debut2023-04-01
Live layer

Delta / regression

xwOBA Δ+0.029
wOBA Δ+0.223

negative regression

Regression watch

Running hot. Expect some cooling.

-4.9σ gap
wOBA (actual)0.508
xwOBA (deserved)0.315

Wiemer’s wOBA sits at 0.508, but the quality of contact underneath says it should be 0.315 — a gap of 0.193, -4.9 standard deviations from the MLB norm over 102 PA. 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
Hitting12026-03-29Disciplined swing decisions drove the score
Projection links / recent games

Available detail

Hitter Projections 20260.285 xwOBA | 8 HRProjection
2026-04-17 vs SF0 HR | 0 RBI / 3 Ch | 0 E1-3 | K, R
2026-04-15 @ PIT0 HR | 0 RBI / 0 Ch | 0 E0-3 | K
2026-04-14 @ PIT0 HR | 0 RBI / 0 Ch | 0 E0-0
2026-04-13 @ PIT0 HR | 0 RBI / 0 Ch | 0 E0-1 | K
2026-04-11 @ MIL0 HR | 0 RBI / 5 Ch | 0 E0-4 | 3 K