It's an interesting discussion and if I had gone further than getting an A in College Physics, I might be trying to prove out whether it is possible for the ball to rise. One thing is certain, the baseball at times seems to rise to the hitter. It also looks like it is curving at times too. For a hitter or an announcer to refer to a pitch like that as a "rising fastball" is okay with me. That is easier to listen to than an announcer or hitter refer to the pitch as an optical illusion that the hitter swung under. Maybe it is just me. Do some groundballs pick up speed as they go through the infield? I don't know, but it seems that way to the fielders at times. If the announcers describe what is going on from the players' POV, they are doing their job. That is clownish for some listeners.