| Term | Description |
|---|---|
| Bat Drop | The difference between a bat’s length in inches and weight in ounces. For example, a 33-inch, 30-ounce bat is a drop -3. |
| Bat Brand | The manufacturer or brand that produces the bat, such as Rawlings, Easton, Louisville Slugger, Marucci, DeMarini, COMBAT, Warstic, or 44 Pro. |
| Bat Line | The broader product family a bat belongs to within a brand’s lineup, often used to group related models across years or variations. |
| Bat Series | A more specific product grouping or sub-line within a bat line, typically used to distinguish related versions, technologies, or performance profiles. |
| Bat Model Year | The product year assigned to the bat by the manufacturer, used to distinguish current and prior versions of the same model. |
| Bat Certification | Bat certification refers to the governing standard a bat must meet to be legal for play in a specific league or competition. Common certifications include BBCOR, USSSA, USA Baseball, and USA Softball. |
| Bat Composition | The bat’s construction type, such as one-piece, two-piece, or hybrid, describing how the barrel and handle are built and connected. |
| Bat Material | The primary materials used in the bat, such as alloy, composite, or hybrid material combinations. |
| Bat Swing Weight | How heavy or light a bat feels during the swing. Swing weight is influenced by total weight, balance point, and moment of inertia, not just listed weight. |
| Bat Barrel Max Circumference | The largest measured circumference around the bat barrel. This reflects the maximum barrel size at its widest point. |
| Bat Barrel Max Circumference Length | The length of the barrel section that maintains or approaches the bat’s maximum circumference. This helps describe the size of the bat’s largest hitting area. |
| Bat Grip Max Circumference | The largest measured circumference around the bat’s grip or handle area. |
| Bat Grip Length Max to Min | The measured distance across the grip or handle area from the widest point to the narrowest point, helping describe the taper and knob transition. |
| Bat Lab Rating | The overall Bat Lab score for a bat, combining measured performance data, swing metrics, and player opinion inputs into a single evaluation. |
| Trackman Component Rating | The Bat Lab component score based on TrackMan ball-flight metrics, such as exit velocity, distance, sweet spot rate, hard-hit rate, and barreled rate. |
| Blast Motion Component Rating | The Bat Lab component score based on Blast Motion swing metrics, such as bat speed, hand speed, and time to contact. |
| Player Opinion Component Rating | The Bat Lab component score based on athlete feedback collected immediately after swinging the bat, including balance, feel, contact, control, pop, and sweet spot. |
| Trackman - Exit Velocity - Performance Boost (mph) | The bat’s average exit velocity lift or decline versus each player’s baseline, measured in miles per hour. Positive values indicate the bat produced higher exit velocity than the player’s session average. |
| Trackman - Exit Velocity - Performance Boost % (mph) | The percentage change in exit velocity versus each player’s baseline. Positive values indicate a percentage lift relative to the player’s session average. |
| Trackman - Exit Velo - Best | The highest exit velocity recorded for the bat during the test set. |
| Trackman - Exit Velocity (Avg) | The average exit velocity recorded for the bat across valid swings. |
| Trackman - Distance - Best | The longest batted-ball distance recorded for the bat during the test set. |
| Trackman - Distance (Avg) | The average batted-ball distance recorded for the bat across valid swings. |
| Trackman - Distance - Performance Boost (ft) | The bat’s average distance lift or decline versus each player’s baseline, measured in feet. Positive values indicate the bat produced more distance than the player’s session average. |
| Trackman - Distance - Performance Boost % (ft) | The percentage change in batted-ball distance versus each player’s baseline. Positive values indicate a percentage lift relative to the player’s session average. |
| Trackman - Sweet Spot Rate - Performance Boost | The change in sweet spot rate versus each player’s baseline, expressed as a percentage-point lift or decline. |
| Trackman - LA Sweet Spot - Avg | The average percentage of batted balls with a launch angle in Bat Lab’s defined sweet spot range. |
| Trackman - Hard Hit Rate - Performance Boost | The change in hard-hit rate versus each player’s baseline, expressed as a percentage-point lift or decline. |
| Trackman - Hard Hit % - Avg | The average percentage of batted balls that met Bat Lab’s hard-hit threshold. |
| Trackman - Barreled Rate - Performance Boost | The change in barreled rate versus each player’s baseline, expressed as a percentage-point lift or decline. |
| Trackman - Barrel % - Avg | The average percentage of batted balls that met Bat Lab’s barrel criteria, typically combining strong exit velocity with a productive launch angle. |
| Trackman - HR Launch Angle (Avg) | The average launch angle of batted balls classified as home runs in the test environment. |
| Trackman - Home Runs (Sum) | The total number of batted balls classified as home runs for the bat during the test set. |
| Blast - Bat Speed - Performance Boost (mph) | The bat’s average bat speed lift or decline versus each player’s baseline, measured in miles per hour. |
| Blast - Bat Speed - Performance Boost % (mph) | The percentage change in bat speed versus each player’s baseline. Positive values indicate a percentage lift relative to the player’s session average. |
| Blast - Bat Speed - Avg | The average bat speed recorded with the bat across valid swings, at time of contact. |
| Blast - Bat Speed - Best | The highest bat speed recorded with the bat during the test set. |
| Blast - Peak Hand Speed - Performance Boost (mph) | The bat’s average peak hand speed lift or decline versus each player’s baseline, measured in miles per hour. |
| Blast - Peak Hand Speed - Performance Boost % (mph) | The percentage change in peak hand speed versus each player’s baseline. Positive values indicate a percentage lift relative to the player’s session average. |
| Blast - Peak Hand Speed - Avg | The average peak hand speed recorded with the bat across valid swings, measured at the knob. |
| Blast - Peak Hand Speed - Best | The highest peak hand speed recorded with the bat during the test set. |
| Blast - Time to Contact - Performance Boost (sec) | The change in time to contact versus each player’s baseline, measured in seconds. Lower values generally indicate the hitter reached contact faster. |
| Blast - Time to Contact - Performance Boost % (sec) | The percentage change in time to contact versus each player’s baseline. Negative values generally indicate a faster move to contact. |
| Blast - Time to Contact - Avg | The average time from swing start to ball contact recorded with the bat across valid swings. |
| Blast - Time to Contact - Best | The fastest time to contact recorded with the bat during the test set. |
| Player Opinion - Balance (Metric) | A player feedback score for how the bat’s weight distribution felt during the swing, including whether it felt balanced, end-loaded, easy to control, or heavy through the zone. |
| Player Opinion - Feel (Metric) | A player feedback score for the bat’s overall comfort and response in the hitter’s hands, including color, look, smoothness, vibration, confidence at contact. |
| Player Opinion - Contact (Metric) | A player feedback score for how solid, responsive, or powerful the bat felt when it met the ball. |
| Player Opinion - Control (Metric) | A player feedback score for how easily the hitter could command the barrel and keep the bat on the intended swing path. |
| Player Opinion - Pop (Metric) | A player feedback score for the perceived explosiveness or jump of the ball off the bat. |
| Player Opinion - Sweet Spot (Metric) | A player feedback score for how large, forgiving, and responsive the bat’s effective hitting area felt during contact. |
Bat Lab Glossary
September 11, 2026
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