[nickrego]

Timing that is !

It's always timing. Even when you don't think it is. You get tired, don't realize it, and you timing gets quicker. Even if you wait a long time to make your calls, your internal timing for determining the pitch speeds up.

You know a Ball from a Strike. That knowledge / experience didn't just disappear. So unless you changed your stance / position, they put in a pitcher that had you confused, or you lost your glasses, it was timing.

If you had something else on your mind, then the solution is to learn to leave it at the gate, or don't do the plate ! (I just made that up, but it's the truth)

And don't beat yourself up over it. It happens to everyone, once in a while. But if you find it happening a lot. Get someone you respect to evaluate you. You'd be surprised what someone else can see.