Hi Mech1978, If you do a search, some older posts will come up on this topic.
Another parent and I took our sons to watch a pro tryout in our area several years ago (probably 5?) just to see what it was all about. It was free and something to do and very near a good bakery in a section of town I don't normally travel
They will ask what position they are trying out for and divide pitchers/everyone else. The 60 will be timed, 2 at a time. That is basically the first cut, but I am not aware that any player left at that point.
Players will then be divided to hit and field.
There were right many college players there by the looks of jerseys and caps. Players came from all around by license plates parked in the area. I took particular notice of what the players wore, since some didn't wear appropriate baseball attire.
From what I could gather from my very inexperienced eye, the pitchers got all the attention, unless a player ran VERY fast.