2019DAD, Wow, that is a lot of information and must have taken a fair amount of time and effort.
Taking one pitcher on your list, Nelson from Trinity U, he was in his junior year when I saw him pitch in late February and talked with the coaches about him.
I saw him in one inning relief appearances. He was 91-92 with a dominant breaking ball, which he also threw very hard. At points during the season, I understand he touched 93.