Mithrandir Metrics
Player Washington Nationals Refreshed Sep 3 06:00 AM ET
Player profile / Washington Nationals

Jorbit Vivas

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

Cards
22
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
2026313296432.242.337.328.665
2 Seasons379357342.227.324.315.639
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.

2026-09-03
16
Offense
percentile
Offense9 metrics
33
Defense4 metrics
55
Speed2 metrics
48
Plate skills12 metrics
55
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-03
xwOBA preseason0.293
xwOBA current pace0.301
xwOBA rolling p500.297
Observed weight59%
xwOBA
0.264 0.280 0.297 0.315 0.331
wOBA
0.296 0.312 0.330 0.347 0.363
ISO
0.061 0.078 0.097 0.116 0.133
K%
13.5% 15.4% 17.5% 19.6% 21.5%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-03
Hitting · percentile strip
Barrel%2.5%
16
Exit velocity82.1
5
Hard-hit%21.7%
4 -30 vs proj
xBA0.287
18
xSLG0.380
9
xwOBA0.301
46
BB%11.5%
83 +51 vs proj
Bat speed67.3
24
K%13.6%
92 +42 vs proj
Defense · percentile strip
Arm Runs0.1 · 3B
47
Arm Strength82.3 · 3B
12
Outs Above Avg4.0 · 3B
88
Range Runs1.9 · 3B
72
Baserunning · percentile strip
Base Running Runs0.7 · 3B
58
Sprint Speed27.0 · 3B
39
SB Success Rate100.0% · 3B
Small sample
Mithrandir+

Stuff+ and arsenal context

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

2026-09-03
Avoids Bad ChasesST 67.9% · rebadged research
63
Avoids Bad TakesHPT 16.0% · rebadged research
96
Correct Decisions72.0% · rebadged research
92
SEAGER+ Plate Discipline111
92
Curveball Stuff+84
0
Mithrandir Stuff+67
3
Resists Breaking - horizontalwOBA 0.266 · borderline
90
Resists Breaking - verticalwOBA 0.281 · insufficient sample
38
Resists ChangeupwOBA 0.281 · validated thin sample
45
Resists Cutters + splitterswOBA 0.332 · insufficient sample
41
Resists FastballwOBA 0.370 · validated
11
Resists SinkerwOBA 0.338 · validated
86
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 0.303 0.301 2026-08-23: 0.2962026-08-24: 0.2962026-08-25: 0.2942026-08-26: 0.2942026-08-27: 0.2952026-08-28: 0.2962026-08-29: 0.2962026-08-30: 0.2942026-08-31: 0.3002026-09-01: 0.3002026-09-02: 0.3012026-09-03: 0.301 2026-08-23 2026-09-03 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: 46%46%Chase: 28%28%Whiff: 16%16%Zone contact: 93%93%Contact: 84%84%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 84 limited sample
SL 16.7% 2 72 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-0.012
wOBA Δ+0.017

negative regression

Regression watch

Running hot. Expect some cooling.

-1.0σ gap
wOBA (actual)0.330
xwOBA (deserved)0.301

Vivas’s wOBA sits at 0.330, but the quality of contact underneath says it should be 0.301 — a gap of 0.029, -1.0 standard deviations from the MLB norm over 323 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
Durbin, Caleb BOS · R 0.67 xwOBA on contactAvg exit velocity Player · Projection
Cronenworth, Jake SD · L 0.66 Max exit velocityChase rate Player · Projection
Palacios, Richie TB · L 0.64 Walk rateBarrel rate Player · Projection
Triolo, Jared PIT · R 0.60 Bat speedMax exit velocity 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
Fielding212026-09-015 chances | 0 difficult plays | Run Exp -1.472
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