Mithrandir Metrics
Player Tampa Bay Rays Refreshed Sep 1 06:00 AM ET
Player profile / Tampa Bay Rays

Cam Booser

P · Bats/Throws L/L · 6' 3", 230 lb · Age 34

Cards
1
Modules
1
Live Δ
yes
Club Tampa Bay Rays Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024233.38430142.2431.34
2025245.52390131.0351.52
2026101.97310032.0380.81
3 Seasons573.5811302105.21161.23
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.

2026-09-01
96
Pitching
percentile
Pitching9 metrics
81
Arsenal4 metrics
50
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-01
ERA preseason3.80
ERA current pace2.03
ERA rolling p503.16
Observed weight36%
ERA
1.46 2.26 3.16 4.05 4.86
FIP
2.77 3.27 3.82 4.37 4.87
K%
22.4% 24.7% 27.2% 29.7% 31.9%
BB%
5.4% 6.8% 8.5% 10.1% 11.5%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-01
Pitching · percentile strip
WHIP0.81
99
ERA2.03
95
BB%5.1%
95 +57 vs proj
K%31.6%
95 +32 vs proj
xwOBA allowed0.247
97 +55 vs proj
Barrel allowed6.0%
73 +42 vs proj
Fastball velo95.7
70
Hard-hit allowed40.5%
35
Whiff%25.2%
68
Mithrandir+

Stuff+ and arsenal context

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

2026-09-01
Cutter Stuff+102
55
Fastball Stuff+102
50
Mithrandir Stuff+103
58
Slider Stuff+100
34
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 Booser, Cam · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.247 2026-08-21: 0.2442026-08-22: 0.2442026-08-23: 0.2442026-08-24: 0.2442026-08-25: 0.2482026-08-26: 0.2482026-08-27: 0.2482026-08-28: 0.2482026-08-29: 0.2482026-08-30: 0.2482026-08-31: 0.2472026-09-01: 0.247 2026-08-21 2026-09-01 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.

4Pitches 2026Season 44%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 Booser, Cam · Aggregate zone metrics; not pitch-by-pitch locations Edge: 34%34%Zone: 52%52%Whiff: 25%25%Called strike: 14%14%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 Booser, Cam · 2026 arsenal snapshot 4-Seam Fastball: 44.0%Cutter: 43.2%Sweeper: 9.8%Changeup: 3.1% FF44% · 96 mphprimary pitch FF 44%FC 43%ST 10%CH 3% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Booser, Cam · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 44% usage, 1″ horizontal break, 14″ drop, 95.7 mphFF96 mphCutter: 43% usage, 1″ horizontal break, 31″ drop, 88.0 mphFC88 mphSweeper: 10% usage, 12″ horizontal break, 44″ drop, 81.5 mphST81 mphChangeup: 3% usage, 15″ horizontal break, 31″ drop, 87.4 mphCH87 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 50.0% 110 102 limited sample
FC 40.9% 90 102 limited sample
SL 8.2% 18 100 limited sample
CH 0.9% 2 104 limited sample
Method note

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

Reference layer

Current snapshot

Age34
Height6' 3"
Weight230 lb
Debut2024-04-19
Live layer

Delta / regression

ERA Δ-2.17
K% Δ+0.076

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.4σ gap
wOBA-against (actual)0.260
xwOBA-against (deserved)0.247

Booser’s wOBA-against sits at 0.260, but the quality of contact underneath says it should be 0.247 — a gap of 0.013, 0.4 standard deviations from the MLB norm over 36 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
Pitching12026-03-24Stuff and strike quality carried the outing
Projection links / recent games

Available detail

Pitcher Projections 202624.1% K | 4.13 ERAProjection
2026-08-15 vs BAL0 ER / 0 K1.0 IP