Stuff or Not vs Pitchr Baseball

The baseball pitching statistic known as Stuff+ compares the physical characteristics of a pitch (Release point, velocity, spin vector, movement profile) to the expected run value. In other words, how many runs are scored on a particular type of pitch? Every Stuff-type pitch grader uses a different combination of pitch variables, sometimes including pitch location, arsenal information, batter attributes (like handedness), and even pitch sequence. Usually, the ultimate goal is to apply a rating to a pitch, and ultimately grade a pitcher's arsenal. One thing lost in this grading approach is understanding how a specific kind of pitch can lead to specific outcomes. For example, sometimes you need a ground ball. How often does a particular sinker lead to a ground ball, and what tweaks to velocity, movement, release point or sequencing can make that pitch even more likely to result in a grounder? This link between pitch characteristics and batted ball types (or event types like whiffs) can have an outsized impact on calling pitches and managing games. The Stuff or Not app is designed to provide coaches and players easily accessible information about event type outcomes, and expected statistics like xAVG and xSLG, for different pitches. The app is built on data from over 5 million Division 1 (D1) college pitches and over 2.2 million Major League Baseball (MLB) pitches from 2022-2025. The app's dashboard screen makes it easy for players to input pitch characteristics and see D1 and MLB event outcome likelihoods. This dashboard is particularly useful for adding competition, and another dimension of coaching, to bullpen sessions. The heatmap screen allows the user to see how quickly, and in what direction, event type outcomes vary with changing pitch characteristics.

Pitchr helps baseball pitchers stop guessing and start training what they actually need to throw harder. Most athletes follow random drills, workouts, and throwing programs without knowing what's actually holding them back. Pitchr changes that. Start with a complete pitching assessment designed to identify your biggest development needs across key areas like strength, power, mobility, mechanics, and throwing ability. Then use your results to understand exactly where you need to improve. ### STOP GUESSING. START DEVELOPING. Pitchr helps you: • Assess your current pitching development • Identify weaknesses that may be limiting your velocity • Understand your strength, power, mobility, and movement needs • Get training recommendations based on your results • Follow pitching-specific workouts and exercises • Learn the principles behind throwing harder • Track your development over time • Build a smarter, more complete approach to pitching ### PITCHR+ Upgrade to Pitchr+ for a more complete development experience. Pitchr+ includes: • Personalized training based on your assessment • Pitching-specific strength, power, and mobility work • Throwing and mechanical development resources • Educational content designed to help you understand your body and delivery • Access to the Pitchr community • Ongoing tools to help you identify and attack your biggest needs Whether you're trying to make your high school team, earn a college opportunity, or take your velocity to the next level, Pitchr gives you a clearer path forward. You don't need more random drills. You need to know what YOU need. Download Pitchr, take your assessment, and start building a better pitcher.