The Worst Question of All Time

In the physics definition of velocity, that means the speed of something in a given direction. But when people discuss baseball Vilo, there's never really a direction given,. And so that sort of sticks in his mind or sticks in his craw. So he just wanted to know why do baseball people use the term Vilo instead of just speed. Like how can you not be pedantic about baseball? like this is something I think about.