[NFump]

Originally Posted by nickrego

Not being a softball person, I'd really be interested in how you throw a softball underhand, with any velocity, and get backspin on it, as with an overhand thrown fastball. If you did, it would work against making the ball rise, but since the ball is being thrown in a upward direction from the start, the spin is overcome by inertia. And a rising Softball is not the same thing as a rising Fastball, which is thrown downward, and then rises.

The same way you get topspin on a curveball thrown overhand.(Think about it). And no it wouldn't work against making it rise. And yes the theory is the same for both the "rise" and the rising fastball.