Mithrandir Metrics
Player Tacoma Rainiers Refreshed Jun 1 06:00 AM ET
Player profile / Tacoma Rainiers

Leo Rivas

3B profile with live context, projection links, and Mithrandir card history when available.

Cards
2
Modules
1
Live Δ
yes
Club Tacoma Rainiers Position 3B Roster Reassigned to Minors Status Out / inactive
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-01
xwOBA preseason0.283
xwOBA current pace0.239
xwOBA rolling p500.266
Observed weight39%
xwOBA
0.226 0.245 0.266 0.287 0.306
wOBA
0.225 0.248 0.274 0.299 0.322
ISO
0.025 0.051 0.079 0.108 0.133
K%
20.4% 22.5% 24.8% 27.1% 29.2%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Hitting · percentile strip
BB%14.3%
94 +21 vs proj
Barrel%1.4%
8
Bat speed61.1
1
Exit velocity85.7
20
Hard-hit%18.2%
3
K%28.6%
19 -22 vs proj
xBA0.235
2
xSLG0.336
4
xwOBA0.239
5 -28 vs proj
Defense · percentile strip
Arm Strength85.0 · 3B
42
Outs Above Avg0.0 · 3B
45
Range Runs0.4 · 3B
51
Baserunning · percentile strip
Sprint Speed27.4 · 3B
53
SB Success Rate100.0% · 3B
Limited
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; missing coverage is shown explicitly.

2026-06-01
Avoids Bad ChasesST 77.0% · rebadged research
95
Avoids Bad TakesHPT 28.0% · rebadged research
23
Correct Decisions68.5% · rebadged research
72
Resists Breaking - horizontalwOBA 0.257 · borderline
94
Resists Breaking - verticalwOBA 0.272 · insufficient sample
68
Resists ChangeupwOBA 0.271 · validated thin sample
67
Resists Cutters + splitterswOBA 0.338 · insufficient sample
33
Resists FastballwOBA 0.299 · validated
98
Resists SinkerwOBA 0.340 · validated
86
SEAGER+ Plate Discipline108
85
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 Rivas, Leo · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 2026-05-17: 0.2372026-05-19: 0.2392026-05-21: 0.2392026-05-23: 0.2392026-05-24: 0.2392026-05-25: 0.2392026-05-26: 0.2392026-05-28: 0.2392026-05-29: 0.2392026-05-30: 0.2392026-05-31: 0.2392026-06-01: 0.239 2026-05-17 2026-06-01 xwOBA MITHRANDIR · CHARTS
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 Rivas, Leo · Aggregate zone metrics; not pitch-by-pitch locations Zone: 50%50%Chase: 17%17%Whiff: 23%23%Zone contact: 85%85%Contact: 77%77%Hard hit: 18%18% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Bat tracking

Swing path, attack angle, bat speed

Aggregate Savant bat-tracking metrics; not per-swing motion capture.

2026
Mithrandir Metrics SWING PATH Parameterized Mithrandir chart rendered as SVG for templates and exports. Swing Path Rivas, Leo · aggregate bat-tracking arc Swing tilt 36.2° Length 7.0 ft Ideal path 51% MITHRANDIR · CHARTS
Mithrandir Metrics ATTACK ANGLE Parameterized Mithrandir chart rendered as SVG for templates and exports. Attack Angle Rivas, Leo · aggregate attack vector Attack angle 15.5° Direction -3.6° MITHRANDIR · CHARTS
Mithrandir Metrics BAT SPEED DISTRIBUTION Parameterized Mithrandir chart rendered as SVG for templates and exports. Bat Speed Rivas, Leo · aggregate bat speed marker 60 mph 85 mph Avg bat speed 65.0 mph Hard swing rate 0% Whiff / swing 23% MITHRANDIR · CHARTS
Reference layer

Current snapshot

Age28
Height5' 7"
Weight150 lb
Debut2024-04-28
Live layer

Delta / regression

xwOBA Δ-0.053
wOBA Δ-0.018

negative regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Hitting22025-10-16Impact contact was the main driver
Projection links / recent games

Available detail

Hitter Projections 20260.292 xwOBA | 6 HRProjection
2026-04-20 vs ATH0 HR | 1 RBI / 1 Ch | 0 E1-4 | 2B, K, RBI
2026-04-17 vs TEX0 HR | 0 RBI / 1 Ch | 0 E0-2 | 2 K
2026-04-15 @ SD0 HR | 0 RBI / 4 Ch | 0 E1-3 | BB, K
2026-04-11 vs HOU0 HR | 0 RBI / 1 Ch | 0 E0-2 | 2 BB, 2 K, R
2026-04-06 @ TEX0 HR | 0 RBI / 3 Ch | 0 E0-3 | K