Seam vs Stuff or Not

Chart every pitch. Win the matchup. Seam is the fastest way to chart, analyze, and understand pitching performance — capturing every pitch in real time and turning it into insight, right from your phone. From the first warm-up toss to the final out: capture it, break it down, and act on it. CHART EVERY PITCH, EVERY GAME Record pitches in real time with an interface built for the speed of the game. Tap location, type, result, and velocity so nothing slips through the cracks. • Plot exact pitch location on the strike zone • Track pitch type, velocity, and result in one tap • Live count, outs, and batters faced always in view STATS THAT TELL THE STORY The moment the game ends, Seam turns your chart into a full breakdown — staff box score, strike percentage, first-pitch strike rate, and an overall game score. • Staff and per-pitcher box scores • Strike % and first-pitch-strike % at a glance • Game Score built on a run-expectancy model SEE EVERY PITCH IN CONTEXT The pitch-location map plots every pitch by type so tendencies jump off the screen. Filter by pitcher, count, result, or batter hand to answer any question in seconds. • Color-coded location map by pitch type • Filter by count, result, and batter handedness • Spot patterns across an outing instantly THE WHOLE OUTING, PITCH BY PITCH Every pitch is logged in order with type, velocity, result, and the count it came in — grouped by inning and batter, with a running line score as the game unfolds. • Color-coded by pitch type with velocity and result • Broken out by inning, batter, and handedness • Running PC, BF, H, SO, and BB totals per inning BUILT AROUND YOUR ROSTER Save pitcher profiles to keep your staff organized and start a new game in seconds. Revisit any saved game for post-game analysis whenever you need it. • Reusable pitcher profiles with their arsenals • Every game saved and ready to review • Configure velocity input and your preferred units FOCUSED ON THE GAME No clutter, no noise — just the tools that help you get better. • Private by default. Without an account, everything stays on your device. Seam never sells your information. • Zero ads. Your focus belongs on the field, not on dismissing pop-ups. • Ready anywhere. No connection required — chart a game from any field, any time. SEAM PRO Seam Pro keeps your entire program in sync. Back up every chart to the cloud, work across all your devices, and make smarter calls from the dugout. • Cloud Backup — every chart saved securely with industry-standard encryption • Unlimited Devices — sign in anywhere and pick up right where you left off • Offline Sync — chart with no signal; everything syncs the moment you reconnect From rec leagues to the pros, Seam is your pitch-charting companion. Download free and chart your first game in minutes. https://get-seam.com/privatepolicy.html

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.