Hit or Not vs Baseball Pop

The Hit or Not app is designed to contribute to coach, player, and fan evaluations of plate appearances (PA) in baseball. The app also works great for batting cage competitions. To make this app work, I take all available data from the 2023-2026 NCAA Division 1 baseball seasons, and 2022-2026 MLB seasons.For each 1 mph increment in exit velocity (EV) and 1° increment in launch angle (LA), I count all instances of outs, singles (1b), doubles (2b), triples (3b) and home runs (hr). The user also has the option to select an outfield direction for the hit. I do not provide the option to choose an infield direction, because NCAA data for hit direction on ground balls is too inaccurate. When the user selects 'MLB', they can make an additional choice to evaluate hits in any of the 30 MLB parks. With these counts based on user input of League, hit Direction, Park, EV, and LA, I compute the mean batting average (AVG) and slugging percentage (SLG). These values of AVG and SLG are equivalent to 'expected stats (xBA or xSLG) for balls in play (not including strikeouts). For both counts and percentages, I apply 9-cell neighborhood averaging around each {EV,LA} pair to account for the average Trackman/Hawkeye errors in EV and LA observations. Similarly, the hit Direction bins are sampled with 5° overlap. When the user taps the 'Calculate' button, the app selects randomly from the distribution of out, 1b, 2b, 3b, and hr counts and displays an outcome that simulates some of the randomness in baseball, while respecting the statistics of the user's inputs for League, hit Direction, Park, EV, and LA. The user can tap the 'Calculate' button as many times as they like, with each tap representing a reroll of the dice. We often use this feature when players or coaches challenge a HitOrNot result during an indoor scrimmage. The heat map screen takes the same data used in the dashboard, and plots the user selected grid as a heatmap. This tool allows users to interrogate the differences in {EV,LA} outcomes for different Leagues, hit Directions, and Parks. The about screen allows users to update the data in the map to the most recent week of NCAA and MLB play. Thank you to Joe Haumacher, Kyle Bonicki, Scott Bradley, and the Princeton University Baseball Team.

Baseball Pop is the ultimate baseball player development platform for coaches, parents, and players. Track performance, run evaluations, optimize lineups, and communicate with your team - all in one place. FEATURES FOR COACHES: • Player Evaluations - Run comprehensive skill assessments for hitting, pitching, fielding, and athletics • Smart Optimizers - AI-powered optimization of batting order, defense, and pitching rotation • Team Management - Create teams, invite players and parents, manage rosters • Game Plans - Build and save lineup, defense, and pitching configurations for upcoming games • Performance Analytics - Track player progress with detailed statistics and leaderboards • Team Messaging - Communicate with players and parents instantly • Event Scheduling - Manage practices, games, and team events with calendar integration FEATURES FOR PARENTS: • View your child's performance data and development progress • Receive push notifications for team events and messages • Track multiple children across different teams • Access complete evaluation history and skill assessments • Switch between children with easy parent view toggle FEATURES FOR PLAYERS: • View your personal stats and performance metrics • See upcoming events and team schedules • Earn medals and awards for achievements • Track your development over the season • Receive notifications for team updates KEY CAPABILITIES: • Works Offline - Evaluate players on the field without internet, syncs when connected • Tablet Optimized - Perfect for clipboard-style evaluations with iPad support • Real-time Sync - Data syncs instantly across all your devices • Push Notifications - Never miss an important team update or message • Calendar Export - Export events to your phone's calendar with one tap • Secure & Private - Your team's data is encrypted and protected OPTIMIZERS: • Batting Order Optimizer - Generate optimal lineups based on player hitting scores • Defense Optimizer - Assign players to their best fielding positions automatically • Pitching Optimizer - Manage pitcher roles and rotations effectively Whether you're coaching a youth travel team, managing a high school program, or tracking your child's baseball journey, Baseball Pop helps you focus on what matters most - player development. Download now and take your team's performance to the next level!