Mithrandir Metrics
Player Sacramento River Cats Refreshed Jun 2 06:00 AM ET
Player profile / Sacramento River Cats

Spencer Bivens

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

Cards
2
Modules
1
Live Δ
--
Club Sacramento River Cats Position P Roster Reassigned to Minors Status Healthy / active roster
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-02
ERA preseason4.33
ERA current pace10.12
ERA rolling p504.65
Observed weight6%
ERA
2.61 3.57 4.65 5.72 6.69
FIP
2.59 3.32 4.12 4.92 5.65
K%
12.6% 15.1% 17.9% 20.7% 23.2%
BB%
3.1% 4.8% 6.7% 8.6% 10.4%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-02
Insufficient sample

Percentile strips appear after the current-season sample clears the threshold.

Mithrandir+

Stuff+ and arsenal context

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

2026-06-02
Stuff+ pending

No current Stuff+ row is available for this pitcher in the latest daily scoring artifact.

Rolling form chart

xwOBA allowed snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

0 snapshots
No chart yet

No Live State xwOBA snapshots are available for this player.

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 Pitch Zone Profile Bivens, Spencer · Aggregate zone metrics; not pitch-by-pitch locations Edge: 33%33%Zone: 51%51%Whiff: 14%14%Called strike: 18%18%First pitch strike: 50%50%Hard hit allowed: 73%73% 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.

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Bivens, Spencer · 2025 arsenal snapshot Sinker: 37.7%Cutter: 27.8%Changeup: 14.9%Sweeper: 8.4%4-Seam Fastball: 6.0%Slurve: 5.1% MIX SI 38%FC 28%CH 15%ST 8%FF 6%SV 5% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Bivens, Spencer · 2025 arsenal snapshot SI: HB 0.3, IVB 2.0SIFC: HB -0.0, IVB 1.9FCCH: HB -0.6, IVB 2.7CHST: HB -0.7, IVB 3.0STFF: HB 0.1, IVB 1.4FFSV: HB -0.1, IVB 4.0SV horizontal break IVB MITHRANDIR · CHARTS
Reference layer

Current snapshot

Age31
Height6' 4"
Weight220 lb
Debut2024-06-16
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching22026-03-23Stuff and strike quality carried the outing
Projection links / recent games

Available detail

Pitcher Projections 202618.6% K | 4.25 ERAProjection
2026-03-20 @ TEX0 ER / 1 K2.0 IP
2026-03-11 @ KC0 ER / 3 K2.0 IP