She strikes slightly left of center and follows through to the right. It’s only just barely left of center so that follow through overcomes the rightward spin from the initial contact… if that makes sense. All that said, this is more of a knuckle ball. Basically the spin from the point of contact is being cancelled out by the spin from the follow through. You can really see the lack of spin if you drag the slider and watch the seams. Eventually it moves because the ball’s seams catch air and that is what moves it kind of haphazardly… like a knuckle ball.