Tim...After reading that, I agree it was not very clear. I think the OP was asking if the pitcher could attempt a pick off during the stretch motion.
I was pointing out that the stretch is a preliminary movement associated with the set position. The pitcher does not have to use the stretch. It's an option. He can just join his hands, come set, and pitch or he can use the motion known as the stretch. He still must come set either way. He can pitch, step and throw or feint, or step off while making the preliminary motion to come set.
Rufus and I are both from Georgia. He knew what I meant.