Abstract: A generally spherical basketball defining a center point and including a carcass having an outer surface and a cover assembly positioned over the outer surface of the carcass. The cover assembly includes at least one cover panel. The cover panel has an outer surface including a valley base surface and first and second sets of spaced-apart projections. Each of the projections of the first and second sets of spaced-apart projections include first and second outermost surfaces, respectively. The first set of projections have an average height measured in a radial direction from the center point within the range of 0.2 to 2.0 mm from the valley base surface to the first outermost surface. The second set of projections have an average height measured in a radial direction from the center point within the range of 15 to 175 ?m from the valley base surface to the second outermost surface.

Abstract: A generally spherical basketball defining a center point and including a carcass having an outer surface and a cover assembly positioned over the outer surface of the carcass. The cover assembly includes at least one cover panel. The cover panel has an outer surface including a valley base surface and first and second sets of spaced-apart projections. Each of the projections of the first and second sets of spaced-apart projections include first and second outermost surfaces, respectively. The first set of projections have an average height measured in a radial direction from the center point within the range of 0.2 to 2.0 mm from the valley base surface to the first outermost surface. The second set of projections have an average height measured in a radial direction from the center point within the range of 15 to 175 ?m from the valley base surface to the second outermost surface.

Abstract: An American style football including an inflatable bladder, a cover surrounding the bladder, a battery carried by the football, and a light emitter. The light emitter is carried by the football and is electrically connected to the battery. At least a portion of the cover transmits light from the light emitter.

Abstract: An American style football including an inflatable bladder, a cover surrounding the bladder, a battery carried by the football, and a light emitter. The light emitter is carried by the football and is electrically connected to the battery. At least a portion of the cover transmits light from the light emitter.

Abstract: A sports ball including an inflatable bladder, a battery carried by the ball, at least one light emitting element carried by the ball, a sensor carried by the ball to sense rotation of the ball, and a controller. The controller is in communication with the sensor and the light emitting element. The controller actuates the light emitter based upon sensed rotation of the ball.