Mithrandir Metrics
Player Los Angeles Angels Refreshed Sep 6 06:00 AM ET
Player profile / Los Angeles Angels

Tyler Heineman

C · Bats/Throws S/R · 5' 10", 190 lb · Age 35

Cards
2
Modules
1
Live Δ
yes
Club Los Angeles Angels Position C Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Swing Sim Projections
PARHHRSBAVGOBPSLGOPS
2024162100.083.313.083.396
2025174254332.289.361.416.777
2026172142711.178.228.230.458
7 Seasons6456612556.223.297.299.596
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.

2026-09-06
4
Offense
percentile
Offense9 metrics
13
Defense4 metrics
65
Speed1 metrics
15
Plate skills12 metrics
45
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-06
xwOBA preseason0.283
xwOBA current pace0.243
xwOBA rolling p500.265
Observed weight45%
xwOBA
0.226 0.244 0.265 0.285 0.304
wOBA
0.195 0.214 0.236 0.257 0.276
ISO
0.047 0.070 0.095 0.120 0.143
K%
13.0% 14.9% 17.0% 19.1% 20.9%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-06
Hitting · percentile strip
Barrel%0.6%
2
Exit velocity76.0
1
Hard-hit%12.7%
1
xBA0.264
9
xSLG0.318
2
xwOBA0.243
7
BB%2.8%
3 -30 vs proj
Bat speed59.9
0
K%14.0%
91 +17 vs proj
Defense · percentile strip
Blocking Runs-0.3 · C
40
Catcher Throwing2.1 · C
84
Framing Runs4.5 · C
87
Pop Time1.9 · C
48
Baserunning · percentile strip
Sprint Speed25.9 · C
15
SB Success Rate100.0% · C
Small sample
Mithrandir+

Stuff+ and arsenal context

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

2026-09-06
Avoids Bad ChasesST 55.8% · rebadged research
12
Avoids Bad TakesHPT 31.3% · rebadged research
10
Correct Decisions62.0% · rebadged research
15
Fastball Stuff+55
0
Mithrandir Stuff+40
0
Resists Breaking - horizontalwOBA 0.272 · borderline
84
Resists Breaking - verticalwOBA 0.253 · insufficient sample
97
Resists ChangeupwOBA 0.248 · validated thin sample
97
Resists Cutters + splitterswOBA 0.307 · insufficient sample
89
Resists FastballwOBA 0.328 · validated
70
Resists SinkerwOBA 0.355 · validated
53
SEAGER+ Plate Discipline86
7
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 Heineman, Tyler · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.303 0.243 2026-08-26: 0.2442026-08-27: 0.2412026-08-28: 0.2412026-08-29: 0.2412026-08-30: 0.2372026-08-31: 0.2372026-09-01: 0.2402026-09-02: 0.2432026-09-03: 0.2432026-09-04: 0.2432026-09-05: 0.2432026-09-06: 0.243 2026-08-26 2026-09-06 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.

2Pitches 2025Season 91%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 Heineman, Tyler · Aggregate zone metrics; not pitch-by-pitch locations Zone: 49%49%Chase: 42%42%Whiff: 18%18%Zone contact: 91%91%Contact: 82%82%Hard hit: 13%13% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2025 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 →

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Heineman, Tyler · 2025 arsenal snapshot Eephus: 91.4%Other: 8.6% EP91% · 52 mphprimary pitch EP 91%FA 9% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Heineman, Tyler · 2025 arsenal snapshot 24″48″72″96″ Eephus: 91% usage, 0″ horizontal break, 86″ drop, 51.5 mphEP52 mphOther: 9% usage, 2″ horizontal break, 40″ drop, 67.3 mphFA67 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 100.0% 12 55 limited sample
Method note

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

Reference layer

Current snapshot

Age35
Height5' 10"
Weight190 lb
Debut2019-09-04
Live layer

Delta / regression

xwOBA Δ-0.015
wOBA Δ-0.022

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.2σ gap
wOBA (actual)0.236
xwOBA (deserved)0.243

Heineman’s wOBA sits at 0.236, but the quality of contact underneath says it should be 0.243 — a gap of 0.007, 0.2 standard deviations from the MLB norm over 178 PA. 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
Fielding22026-08-141 chances | 0 difficult plays | Run Exp -0.218
Projection links / recent games

Available detail

Hitter Projections 20260.258 xwOBA | 7 HRProjection
2026-08-15 vs KC0 HR | 0 RBI / 13 Ch | 0 E0-3
2026-04-20 @ LAA0 HR | 0 RBI / 18 Ch | 0 E0-2 | K
2026-04-17 @ AZ0 HR | 0 RBI / 6 Ch | 1 E1-3 | K, R
2026-04-14 @ MIL0 HR | 0 RBI / 3 Ch | 0 E0-1
2026-04-08 vs LAD0 HR | 0 RBI / 9 Ch | 0 E1-3 | K