Mithrandir Metrics
Player Washington Nationals Refreshed Sep 29 06:00 AM ET
Player profile / Washington Nationals

Jorbit Vivas

3B · Bats/Throws L/R · 5' 9", 171 lb · Age 25

Cards
28
Modules
2
Live Δ
yes
Club Washington Nationals Position 3B Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Swing Sim Projections
PARHHRSBAVGOBPSLGOPS
2025666910.161.266.250.516
2026364327432.238.331.322.653
2 Seasons430388342.226.321.311.632
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.

2026-09-29
14
Offense
percentile
Offense9 metrics
31
Defense4 metrics
57
Speed2 metrics
54
Plate skills12 metrics
56
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-29
xwOBA preseason0.293
xwOBA current pace0.292
xwOBA rolling p500.292
Observed weight63%
xwOBA
0.261 0.276 0.292 0.309 0.324
wOBA
0.292 0.307 0.323 0.340 0.354
ISO
0.062 0.077 0.094 0.112 0.127
K%
14.3% 16.1% 18.0% 20.0% 21.7%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-29
Hitting · percentile strip
Barrel%2.1%
14
Exit velocity82.4
6
Hard-hit%21.6%
4 -31 vs proj
xBA0.284
16
xSLG0.372
7
xwOBA0.292
37 -24 vs proj
BB%11.2%
83 +50 vs proj
Bat speed67.5
26
K%15.0%
89 +38 vs proj
Defense · percentile strip
Arm Runs0.1 · 2B
49
Arm Strength82.3 · 2B
11
Outs Above Avg4.0 · 2B
88
Range Runs3.0 · 2B
81
Baserunning · percentile strip
Base Running Runs1.2 · 2B
68
Sprint Speed27.1 · 2B
41
SB Success Rate100.0% · 2B
Small sample
Mithrandir+

Stuff+ and arsenal context

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

2026-09-29
Avoids Bad ChasesST 67.7% · rebadged research
62
Avoids Bad TakesHPT 17.2% · rebadged research
96
Correct Decisions71.2% · rebadged research
91
SEAGER+ Plate Discipline111
92
Curveball Stuff+91
0
Mithrandir Stuff+77
5
Resists Breaking - horizontalwOBA 0.279 · borderline
73
Resists Breaking - verticalwOBA 0.282 · insufficient sample
42
Resists ChangeupwOBA 0.276 · validated thin sample
65
Resists Cutters + splitterswOBA 0.336 · insufficient sample
27
Resists FastballwOBA 0.352 · validated
26
Resists SinkerwOBA 0.331 · validated
92
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 Vivas, Jorbit · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.301 0.292 2026-09-18: 0.2922026-09-19: 0.2932026-09-20: 0.2932026-09-21: 0.2952026-09-22: 0.2942026-09-23: 0.2932026-09-24: 0.2932026-09-25: 0.2932026-09-26: 0.2932026-09-27: 0.2922026-09-28: 0.2922026-09-29: 0.292 2026-09-18 2026-09-29 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.

1Pitches 2026Season 100%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 Vivas, Jorbit · Aggregate zone metrics; not pitch-by-pitch locations Zone: 45%45%Chase: 29%29%Whiff: 17%17%Zone contact: 92%92%Contact: 83%83%Hard hit: 22%22% 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 Vivas, Jorbit · 2026 arsenal snapshot Eephus: 100.0% EP100% · 46 mphprimary pitch EP 100% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Vivas, Jorbit · 2026 arsenal snapshot 6″12″18″24″ Eephus: 100% usage, 0″ horizontal break, 10″ drop, 45.6 mphEP46 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CB 83.3% 10 91 limited sample
SL 16.7% 2 64 limited sample
Method note

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

Reference layer

Current snapshot

Age25
Height5' 9"
Weight171 lb
Debut2025-05-02
Live layer

Delta / regression

xwOBA Δ-0.021
wOBA Δ+0.011

negative regression

Regression watch

Running hot. Expect some cooling.

-1.1σ gap
wOBA (actual)0.323
xwOBA (deserved)0.292

Vivas’s wOBA sits at 0.323, but the quality of contact underneath says it should be 0.292 — a gap of 0.031, -1.1 standard deviations from the MLB norm over 374 PA. The results have outrun the underlying process; as the sample grows, expect the numbers to drift back toward the deserved level.

Comp Engine · 2026 profile shape

Closest profiles

Full constellation →
PlayerSimilarityAgrees onOpen
Cronenworth, Jake SD · L 0.69 Fly-ball rateChase rate Player · Projection
Durbin, Caleb BOS · R 0.67 xwOBA on contactChase rate Player · Projection
Triolo, Jared PIT · R 0.62 Swing lengthMax exit velocity Player · Projection
Palacios, Richie TB · L 0.62 Walk rateWhiff rate Player · Projection

Profile-shape similarity, not results: six weighted feature groups standardized within this season's qualified hitters.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Hitting12026-06-23Impact contact was the main driver
Fielding272026-09-222 chances | 0 difficult plays | Run Exp -0.105
Projection links / recent games

Available detail

Hitter Projections 20260.312 xwOBA | 6 HRProjection
2026-04-17 vs SF0 HR | 0 RBI / 0 Ch | 0 E0-1
2026-04-15 @ PIT0 HR | 0 RBI / 3 Ch | 0 E1-3 | K
2026-04-14 @ PIT0 HR | 0 RBI / 2 Ch | 1 E1-3 | HBP, K
2026-04-13 @ PIT0 HR | 0 RBI / 2 Ch | 0 E1-3 | 2B, BB, R
2026-04-12 @ MIL0 HR | 0 RBI / 2 Ch | 0 E1-3