If you know it's coming, you just cheat and start your swing early. And if you get much of the bat on it, you have a decent shot at getting a hit. You can't cheat on a sweeping slider or hammer curveball. I played against guys in HS who could bring it at 90+, but they usually had no other pitches. I could hit them (at least make solid contact). Hell, at that velo you don't have to take a full swing - just choke up a bit and try your best to "catch" the ball with the barrel of the bat. I was lost against anything with decent movement or contrasting speeds. If the fastball has good (just about any) movement, then yeah, that's a different story. EDIT: of course, this is assuming you have a respectable level of hand/eye coordination.