When Major League Baseball introduced Statcast in 2015, it transformed the way analysts, coaches and fans think about the sport. The system uses a network of high‑resolution cameras and radar equipment to capture every movement on the field, turning raw data into a granular portrait of performance.
Measuring the Bat
A hard‑hit ball is defined as any contact that leaves the bat at 95 miles per hour or higher, a threshold that helps isolate the most powerful swings. Bat speed is recorded at the sweet spot, with the top 90 percent of swings determining a player's average speed. The distance the bat head travels through three‑dimensional space from the start of the swing to impact is also tracked, giving a sense of the swing's full arc. For batters, EV50 represents the average exit velocity of their hardest half of batted balls, while adjusted EV caps the maximum at 88 miles per hour to normalize extreme outliers.
Pitching Nuances
Pitch movement is expressed in inches, comparing each pitch's actual break to the league average, and active spin quantifies the portion of spin that contributes directly to that movement. Release distance from the mound, measured in feet, helps contextualize a pitcher's positioning and timing. xwOBA blends exit velocity, launch angle and sprint speed to evaluate the likely outcome of a batted ball, and xERA translates that metric into a more familiar ERA‑style figure for pitchers. The system also captures the top 90 percent of swing speeds to define what constitutes a fast swing, typically 75 miles per hour or more.
Defensive and Running Metrics
Outfielders' routes are analyzed through a jump metric that highlights the quickest reactions and most direct paths to the ball, while catchers' reaction times to stolen‑base attempts or pickoff throws are measured in seconds. Defensive metrics such as OAA, blocking and framing are converted into a run‑based scale, allowing teams to compare a player's glove work directly with traditional statistics. Sprint speed, recorded in feet per second during a player's fastest one‑second window, identifies the league's quickest runners, and a 'Bolt' run is flagged when that speed reaches at least 30 feet per second.