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

Jhonny Pereda

C · Bats/Throws R/R · 6' 1", 202 lb · Age 30

Cards
1
Modules
1
Live Δ
yes
Club Seattle Mariners Position C Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Swing Sim Projections
PARHHRSBAVGOBPSLGOPS
2024402900.231.250.231.481
20257841700.246.325.333.658
2026101122720.300.366.389.755
3 Seasons219185320.268.330.338.668
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.

2026-10-16
69
Offense
percentile
Offense9 metrics
63
Defense4 metrics
43
Speed1 metrics
3
Plate skills11 metrics
49
Rolling projection

Preseason / current pace / Bayesian update

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

Pending

Rolling player projection appears after current-season Statcast and projection joins refresh.

Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-10-16
Hitting · percentile strip
Barrel%1.8%
10
Exit velocity90.1
80
Hard-hit%45.9%
84
xBA0.387
97
xSLG0.507
53
xwOBA0.345
89
BB%8.3%
48
Bat speed69.3
44
K%21.1%
61
Defense · percentile strip
Blocking Runs0.2 · C
60
Catcher Throwing0.1 · C
58
Framing Runs-1.7 · C
31
Pop Time2.0 · C
22
Baserunning · percentile strip
Sprint Speed24.6 · C
3
Mithrandir+

Stuff+ and arsenal context

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

2026-10-16
Avoids Bad ChasesST 69.4% · rebadged research
70
Avoids Bad TakesHPT 22.4% · rebadged research
78
Correct Decisions69.2% · rebadged research
79
Mithrandir Stuff+73
4
Resists Breaking - horizontalwOBA 0.300 · borderline
26
Resists Breaking - verticalwOBA 0.284 · insufficient sample
36
Resists ChangeupwOBA 0.282 · validated thin sample
45
Resists Cutters + splitterswOBA 0.332 · insufficient sample
33
Resists FastballwOBA 0.342 · validated
39
Resists SinkerwOBA 0.356 · validated
50
SEAGER+ Plate Discipline107
82
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 Pereda, Jhonny · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.301 0.345 2026-10-05: 0.3452026-10-06: 0.3452026-10-07: 0.3452026-10-08: 0.3452026-10-09: 0.3452026-10-10: 0.3452026-10-11: 0.3452026-10-12: 0.3452026-10-13: 0.3452026-10-14: 0.3452026-10-15: 0.3452026-10-16: 0.345 2026-10-05 2026-10-16 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.

3Pitches 2025Season 77%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 Pereda, Jhonny · Aggregate zone metrics; not pitch-by-pitch locations Zone: 50%50%Chase: 25%25%Whiff: 21%21%Zone contact: 82%82%Contact: 79%79%Hard hit: 46%46% 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 Pereda, Jhonny · 2025 arsenal snapshot Other: 77.1%4-Seam Fastball: 12.9%Eephus: 10.0% FA77% · 68 mphprimary pitch FA 77%FF 13%EP 10% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Pereda, Jhonny · 2025 arsenal snapshot 6″12″18″24″ Other: 77% usage, 0″ horizontal break, 4″ drop, 67.7 mphFA68 mph4-Seam Fastball: 13% usage, 0″ horizontal break, 2″ drop, 88.0 mphFF88 mphEephus: 10% usage, 0″ horizontal break, 10″ drop, 45.1 mphEP45 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 100.0% 4 55 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' 1"
Weight202 lb
Debut2024-04-17
Live layer

Delta / regression

xwOBA Δ--
wOBA Δ--

negative regression

Regression watch

Running hot. Expect some cooling.

-0.7σ gap
wOBA (actual)0.373
xwOBA (deserved)0.345

Pereda’s wOBA sits at 0.373, but the quality of contact underneath says it should be 0.345 — a gap of 0.027, -0.7 standard deviations from the MLB norm over 109 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
Fielding12026-09-061 chances | 0 difficult plays | Run Exp -0.148
Projection links / recent games

Available detail

Hitter Projections 20260.272 xwOBA | 5 HRProjection
2026-05-20 vs CWS1 HR | 1 RBI / 14 Ch | 0 E1-2 | HR, BB, RBI