I believe they see a pattern on the ball that is made by the spin of a particular pitch, not necessarily reading the rotation, per se. I may be wrong though.
There are hitters who have said that when they are ‘in the zone’ they can see the seams and make contact between them!
Maybe it is just a pattern, but they certainly believe they see the individual seams.
“I believe they see a pattern on the ball that is made by the spin of a particular pitch, not necessarily reading the rotation, per se. I may be wrong though.”
I wouldn’t know. I can’t even drive at night when it’s raining because I can’t see the painted lines in the road.