Too much rotation? (counter-rotation)

What do you guys use to teach a pitcher who counter rotates too much, and therefore has a difficult time getting a good downward angle on his off-speed pitches?

Some counter rotation is ok, but when is too much? And how to close up a guy?

Like with the long arm path, counter-rotation takes time which means the pitcher may be taking too much time to execute his delivery. Getting him moving forward sooner/faster and you’ll reduce the time he has to do things. Simply getting the butt moving down the hill sooner/faster often has the effect of cleaning up other elements of the delivery.

Seriously, if you put focus on timing instead of mechanics, you’ll find the mechanics may clean themselves up.