Auto detect and auto pan to ball in video
You could do it in real life by attaching a transmitter to the ball and having a robotic pan/tilt tripod head track the movement.  If you're shooting 4K, your budget's probably in line with something like soloshot. Or, of course, you could pay a cam-op.  Taking the time (or paying someone) to track it in Mocha or AE will end up being more expensive than capturing the moment as it happens.