Grade every pitch.
Upload your Trackman data and get a comprehensive report with official Tstuff+ grades, intuitive graphs, helpful trends, and the raw data you need to advance your game. For amateur players, we do not rely on a traditional MLB Stuff model alone. We first grade the shape of each pitch, then blend that shape grade with velocity to produce the official Tstuff+ you see in the report.
We made that change because standard MLB Stuff models do not transfer cleanly to amateur pitchers. Our shape-first, velocity-blended approach has held up better for amateur evaluation while still staying anchored to MLB performance baselines.
Project yourself to the next level.
Our projection engine re-scores every pitch to show you what your game would look like with a faster average velocity, and even a taller height—all based on the spin and movement profile of each pitch. This engine lets you see where you are and where you need to get to—all in one report.
How the Projection Engine Works
Height Projection
Release point scales proportionally to projected adult height. A taller body changes the release point, and in doing so changes the pitch’s metrics. We account for that.
Velocity Projection
Set a projection (or just a new target) for your average fastball velocity. Effective speed of your secondary pitches is recalculated, and new grades are made in comparison to Major League performance baselines.
Movement Projection
Increasing velocity affects your spin rate, vertical break, and horizontal break. We scale every measurement to give better projections. A slower pitch moves more because it has more time before it arrives at the plate. This doesn’t make it better! Our model accounts for that and ensures your projected grades do too.
How It Works
From Trackman data to shape-first pitch grades, advanced analysis, and visual reports, in minutes.
Upload
Drop your Trackman CSV or upload a report image or PDF. Data validation and parsing are handled automatically.
Grade
We grade pitch shape first, then blend shape with velocity to produce the official Tstuff+ grade shown in every report.
Improve
With actionable insights, MLB pitcher comps, and high-priority improvement zones, you’ll have everything you need to work into your current development plan, or even create a new one from the ground up.
Pitch Grades & Session Types
Tstuff+ in Stockyard Reports is built for amateur players: we grade the pitch's shape, then blend in velocity for the official Tstuff+ grade.
Bullpen and game uploads both use the same official Tstuff+ grading path, while game files still unlock the richer pitch-by-pitch report context.
In Every Report
Every report has MLB-level pitch grades, raw numbers, visual graphs, player comparisons, session summaries, and high-priority improvement zones for you—all tailored for your immediate understanding, and improvement on the field.
Jake Mitchell
Overall Grades
vs 2025 MLBvs MLB Population
Arsenal Breakdown
| Pitch | # | Tstuff+ | |
|---|---|---|---|
| LHB | RHB | ||
Four-Seam Fastball | 28 | 117 | 113 |
Slider | 18 | 115 | 121 |
Changeup | 12 | 103 | 107 |
Curveball | 8 | 97 | 101 |
Pitch Movement
High-Priority Improvement Zones
Biggest Tstuff+ gains from trainable changes
Release Point
MLB Comparisons
Most similar MLB pitch profiles (2025 season)
Pitch-by-Pitch(showing 6 of 66)
| # | Pitch | Velo | S+ | |
|---|---|---|---|---|
| LHB | RHB | |||
| 1 | Four-Seam Fastball | 92.8 | 115 | 111 |
| 2 | Four-Seam Fastball | 93.5 | 119 | 115 |
| 3 | Slider | 83.7 | 118 | 124 |
| 4 | Four-Seam Fastball | 93.1 | 116 | 112 |
| 5 | Changeup | 85.2 | 105 | 109 |
| 6 | Slider | 84.5 | 113 | 119 |
Track Your Development
Individual reports are powerful. Tracking change over time is even better. The Player Dashboard aggregates every session on record into a Player Profile where you can identify, analyze, and monitor your change over time.
Jake Mitchell
Overall Grade Trends
Tstuff+ by Pitch Type
Fastball Velocity
Session History
Grade Trends
Watch your Tstuff+ evolve across sessions and spot when changes in shape or velocity start to stick.
Per-Pitch Tracking
Know exactly which pitch you worked on? Need to know which pitches are developing and which ones are lagging behind? Track each pitch type independently with Per-Pitch Tracking.
Velocity & Spin Trends
Monitor average and max velocity, spin rate, and other physical metrics over time. Compare the effects of different environments, grips, and cues on pitch characteristics.
Session Management
Exclude bad-data, extreme weather, or inconsequential sessions from your trends. Toggle any session on/off to see how it affects your trends, your trajectories, and most importantly: your own analysis.
Player Profile available with any membership plan. Your dashboard automatically updates with every new upload.
Create Your AccountUnderstanding the Grades
Every report gives you an official Tstuff+ grade built from shape first, then velocity.
Tstuff+
Our official Tstuff+ starts with a grade for pitch shape, then blends in velocity. We use this shape-first approach because traditional MLB Stuff models do not transfer cleanly to amateur pitchers.
Grade Scale
Built on a modern MLB reference dataset across 11 Statcast seasons, but adapted for amateur evaluation with our shape-first, velocity-blended Tstuff+ approach and the same research stack that powers app.stockyardbaseball.com.
Simple Pricing
No upcharges, extra addons, or hidden fees. Just the complete report, every time.
Membership
- 10 reports per month
- Report history dashboard
- Saved pitcher profiles
- Priority processing
Team and organization workflows are available by request during launch.
Custom
Need a custom plan for your organization?
- Custom report volume
- Dedicated support
- Custom integrations
- Tailored to your organization
Built on Real Data
Our methodology is published on our website, and our reports use MLB data as the reference point without pretending amateur inputs behave exactly like pro ones. That is why our official Tstuff+ starts with pitch shape and then blends in velocity. Explore the deeper methodology write-up at StockyardBaseball.com.
How Tstuff+ Is Built In Reports
Traditional MLB Stuff models did not hold up well enough on amateur Trackman inputs. Our reports now follow a shape-first flow that performed better for amateur evaluation.
1. Grade Pitch Shape
We first score the underlying shape of the pitch: movement, spin characteristics, release traits, and the physical profile that makes the pitch play.
2. Blend In Velocity
Velocity is then blended into that shape grade to produce the official Tstuff+ shown in the report, instead of letting a straight MLB Stuff model dominate the result.
3. Produce One Official Tstuff+
That same shape-first pipeline is the official grade throughout the site, so bullpen and game uploads stay on one consistent Tstuff+ scale.
Projection Methodology
When you provide a projected height and target fastball velocity, we scale every pitch using empirically validated relationships from 7.7M+ MLB pitches. Here’s exactly how it works.
Height Scaling
Release point and extension scale proportionally to projected height, using fractions validated against 3,747 MLB pitcher-seasons.
Velocity Cascade
When velocity changes, spin rate, vertical acceleration, and horizontal acceleration adjust based on empirical year-over-year slopes from 2,427 consecutive-season MLB pitcher pairs (2020–2025).
Movement Recomputation
After adjusting accelerations, induced vertical break and horizontal break are recomputed from physics (pfx = ½at²) at the new flight time. Spin axis and pitch design are preserved.
The result is a full re-grade of every pitch at the projected physical profile, using the same Tstuff+ model that evaluates MLB pitchers.
View per-pitch-type spin slopes & sourcesHide technical details
| Pitch Type | Spin Slope | Pitcher Pairs | R² |
|---|---|---|---|
| Four-Seam (FF) | +24 RPM/mph | 1,826 | 0.135 |
| Sinker (SI) | +21 RPM/mph | 976 | 0.094 |
| Curveball (CU) | +22 RPM/mph | 658 | 0.096 |
| Changeup (CH) | +16 RPM/mph | 757 | 0.039 |
| Sweeper (ST) | +13 RPM/mph | 330 | 0.040 |
| Splitter (FS) | +38 RPM/mph | 140 | 0.173 |
Sources
- Statcast 2020–2025 — 3,747 consecutive-season pitcher pairs
- Driveline Baseball — Spin-velocity coupling research
- Alan Nathan — Magnus force physics (baseball.physics.illinois.edu)
Ready to get to work?
Upload your Trackman file and get your full report, including official Tstuff+ grades in minutes.
No subscription needed — buy a single report anytime.