Wanted to provide this information for anyone that may find it useful.
My son recently participated in a "Charity fundraiser" PBR Ohio Showcase held at the Bo Jackson complex in Hilliard. This showcase was only open for unsigned HS seniors and was $50.
Position only players had a later check-in so I can't provide insight to the pitcher/catcher component.
First item of business was headshots. My son said no one smiled, so I suppose that's the norm.
They were given time to warm-up and stretch.
First data collection was the 60. Everyone got to run once. Son said they had to start at a specific spot and were to begin running when a green light lit up. One runner at a time.
Hitting. Some of the hitting metrics were done in the cage. I did not watch the cage part, so I can't provide much insight. The hitting part that I watched was measuring EV, distance, and "Sweet Spot" percentage. Pitcher was a PBR staff member who was right handed, shorter than the average baseball player, and a bit inconsistent. However, he was the pitcher for everyone. It seems like they got 10 maybe 12 pitches. You used your own bat. Although I did witness some players sharing a bat.
INF and OF Velos. Infielders were fed fungo hit balls to all areas and were to throw to 1B. The velos were measured with a radar gun positioned behind a screen directly behind the 1st baseman. Outfielders were fed fungo grounders only (no fly balls, due to being indoors) and were to throw to an "infielder". The radar gun was positioned behind a screen directly behind the receiving player.
My son was told by his peers that have gone to PBR showcases in another state, that the 60 was run twice and throwing velos were measured from behind the thrower. So there are some differences between PBR showcases with how data is gathered.