When I use to play shinny/road hockey as a kid we did use tennis balls instead of a puck. LOL!I can see it now. All sports should start using tennis balls and only tennis balls.
Basketball will dribble Penns down the hard court.
Hockey players will stickhandle the Wilsons down the ice.
Baseball pitchers will throw Dunlops at a wicked 50 mph.
Cause you know those are the balls tennis uses.
All sports should conform.