Isn't a splitter what they used to call a fork ball? Years ago when a RHP threw a pitch that broke sharply down and in on a RH bat it was a fork ball. Years before that it was called a screw ball. Same pitch now called a splitter.
Why?
He's broken. Maybe permanently. Going back to last year its been about 300 ABs of this futility. He's to the point where if he sees 5 pitches then makes his out it's a good AB.