Mithrandir Metrics
Player San Francisco Giants Refreshed Jun 14 06:00 AM ET
Player profile / San Francisco Giants

Trevor McDonald

P · Bats/Throws R/R · 6' 0", 205 lb · Age 25

Cards
5
Modules
1
Live Δ
yes
Club San Francisco Giants Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024000.001003.010.33
2025101.8032015.0141.00
2026244.6488042.2411.29
3 Seasons343.711210060.2561.17
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.

2026-06-14
56
Pitching
percentile
Pitching9 metrics
56
Arsenal4 metrics
48
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-14
ERA preseason3.35
ERA current pace4.15
ERA rolling p503.69
Observed weight42%
ERA
1.94 2.77 3.69 4.61 5.44
FIP
2.58 3.05 3.57 4.09 4.56
K%
16.8% 18.9% 21.2% 23.5% 25.6%
BB%
4.0% 5.2% 6.5% 7.8% 9.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-14
Pitching · percentile strip
WHIP1.28
53
ERA4.15
42
BB%6.8%
76
K%22.6%
50
xwOBA allowed0.305
59 +20 vs proj
Barrel allowed5.1%
81 +37 vs proj
Fastball velo93.9
42
Hard-hit allowed41.9%
35
Whiff%25.7%
71
Mithrandir+

Stuff+ and arsenal context

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

2026-06-14
Mithrandir Stuff+104
63
Sinker Stuff+103
57
Changeup Stuff+94
9
Slider Stuff+104
61
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 McDonald, Trevor · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.305 2026-06-03: 0.3072026-06-04: 0.3082026-06-05: 0.3082026-06-06: 0.3092026-06-07: 0.3092026-06-08: 0.3052026-06-09: 0.3052026-06-10: 0.3052026-06-11: 0.3052026-06-12: 0.3052026-06-13: 0.3052026-06-14: 0.305 2026-06-03 2026-06-14 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 57%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 McDonald, Trevor · Aggregate zone metrics; not pitch-by-pitch locations Edge: 41%41%Zone: 49%49%Whiff: 26%26%Called strike: 18%18%First pitch strike: 51%51%Hard hit allowed: 42%42% 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 McDonald, Trevor · 2026 arsenal snapshot Sinker: 57.3%Slider: 29.2%Changeup: 13.1%Cutter: 0.5% SI57% · 94 mphprimary pitch SI 57%SL 29%CH 13%FC 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal McDonald, Trevor · 2026 arsenal snapshot 12″24″36″48″ Sinker: 57% usage, 0″ horizontal break, 30″ drop, 93.9 mphSI94 mphSlider: 29% usage, 1″ horizontal break, 41″ drop, 86.3 mphSL86 mphChangeup: 13% usage, 11″ horizontal break, 38″ drop, 83.5 mphCH83 mphCutter: 0% usage, 3″ horizontal break, 27″ drop, 91.6 mphFC92 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 58.1% 297 103 qualified
SL 28.8% 147 104 limited sample
CH 12.7% 65 94 limited sample
FC 0.4% 2 28 limited sample
Method note

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

Reference layer

Current snapshot

Age25
Height6' 0"
Weight205 lb
Debut2024-09-29
Live layer

Delta / regression

ERA Δ-0.25
K% Δ+0.013

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.5σ gap
wOBA-against (actual)0.357
xwOBA-against (deserved)0.305

McDonald’s wOBA-against sits at 0.357, but the quality of contact underneath says it should be 0.305 — a gap of 0.052, 1.5 standard deviations from the MLB norm over 41 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
Pitching52026-05-27Sinker played up through SI/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202621.3% K | 4.40 ERAProjection
2026-03-21 vs CLE5 ER / 2 K0.2 IP
2026-03-18 @ LAD2 ER / 1 K1.0 IP