Abstract: An electronically trackable ball consisting of a cover, an inflatable bladder, a valve in the bladder a mounting structure attached to said valve and extending inwardly of the valve toward the center of the inflated bladder and an electronic transmission device on said mounting structure remote from said valve. The mounting structure is preferably a lightweight polymeric cylinder with the electronics fitted at the end remote from the valve and close to the center of mass of the ball. The device is within the ball, and is constrained from moving around inside the ball.

Abstract: A system of collecting and displaying statistical performance data of American football or rugby football tactical plays includes a) Optional ball tracking sensors b) data loggers worn by each player that include accelerometers and location sensors that provide data on duration of play, acceleration, speed, direction of movement, possession of ball, force of impacts c) a processor that collects and analyzes the data for each tactical play to determine i) the initial fine of scrimmage for each play, ii) the end of each play, iii) for each player one or more of duration of play, acceleration, speed, direction of movement, possession of ball, force of impacts, and iv) normalizing all the statistics so that all tactical plays and all individual player performances can be compared from the same start point d) display means to graphically display the statistics and combine the graphics with video images of the play and players.