Mithrandir Metrics
Player Cleveland Guardians Refreshed Sep 28 06:00 AM ET
Player profile / Cleveland Guardians

Tanner Bibee

P · Bats/Throws R/R · 6' 2", 205 lb · Age 27

Cards
37
Modules
1
Live Δ
yes
Club Cleveland Guardians Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
20241283.4731310173.21871.12
202512114.2431310182.11621.23
20267154.3633330188.01481.22
4 Seasons41383.821201200686.06381.19
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.

2026-09-28
50
Pitching
percentile
Pitching9 metrics
43
Arsenal7 metrics
58
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.

2026-09-28
Pitching · percentile strip
WHIP1.29
57
ERA4.35
42
BB%6.6%
84
K%18.7%
27
xwOBA allowed0.320
41
Barrel allowed9.5%
20
Fastball velo93.6
36
Hard-hit allowed40.1%
37
Whiff%21.6%
43
Mithrandir+

Stuff+ and arsenal context

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

2026-09-28
Changeup Stuff+100
37
Curveball Stuff+103
58
Cutter Stuff+103
72
Fastball Stuff+102
46
Mithrandir Stuff+103
55
Sinker Stuff+102
46
Slider Stuff+108
91
Rolling form chart

xwOBA allowed 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 allowed Bibee, Tanner · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.320 2026-09-14: 0.3182026-09-18: 0.3182026-09-19: 0.3182026-09-20: 0.3182026-09-21: 0.3182026-09-22: 0.3182026-09-23: 0.3182026-09-24: 0.3182026-09-25: 0.3182026-09-26: 0.3182026-09-27: 0.3202026-09-28: 0.320 2026-09-14 2026-09-28 xwOBA allowed 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.

6Pitches 2026Season 24%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 Pitch Zone Profile Bibee, Tanner · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 49%49%Whiff: 22%22%Called strike: 17%17%First pitch strike: 50%50%Hard hit allowed: 40%40% 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 Bibee, Tanner · 2026 arsenal snapshot Cutter: 24.4%4-Seam Fastball: 23.8%Sinker: 20.5%Changeup: 15.4%Curveball: 11.0%Sweeper: 5.0% FC24% · 86 mphprimary pitch FC 24%FF 24%SI 20%CH 15%CU 11%ST 5% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Bibee, Tanner · 2026 arsenal snapshot 15″30″45″60″ Cutter: 24% usage, 0″ horizontal break, 35″ drop, 85.7 mphFC86 mph4-Seam Fastball: 24% usage, 2″ horizontal break, 15″ drop, 94.0 mphFF94 mphSinker: 20% usage, 3″ horizontal break, 22″ drop, 93.2 mphSI93 mphChangeup: 15% usage, 8″ horizontal break, 29″ drop, 80.9 mphCH81 mphCurveball: 11% usage, 4″ horizontal break, 53″ drop, 78.1 mphCU78 mphSweeper: 5% usage, 0″ horizontal break, 41″ drop, 82.5 mphST82 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FC 24.7% 530 103 qualified
FB 24.5% 527 102 qualified
SI 18.1% 389 102 qualified
CH 17.6% 378 100 qualified
CB 11.1% 239 103 qualified
SL 3.9% 84 108 limited sample
Method note

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

Reference layer

Current snapshot

Age27
Height6' 2"
Weight205 lb
Debut2023-04-26
Live layer

Delta / regression

ERA Δ--
K% Δ--

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.6σ gap
wOBA-against (actual)0.357
xwOBA-against (deserved)0.320

Bibee’s wOBA-against sits at 0.357, but the quality of contact underneath says it should be 0.320 — a gap of 0.037, 1.6 standard deviations from the MLB norm over 196 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching372026-09-26Sinker played up through SI/FC tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202622.3% K | 4.12 ERAProjection
2026-05-20 @ DET1 ER / 5 K8.0 IP
2026-04-17 vs BAL0 ER / 5 K6.0 IP
2026-04-12 @ ATL8 ER / 4 K4.2 IP
2026-04-06 vs KC1 ER / 3 K4.2 IP
2026-03-31 @ LAD1 ER / 4 K4.0 IP