My son has gone through this with a couple of MLB teams this past month. They were all done with team trainers with a couple of scouts in attendance. The ones he has done were more of a mobility assessment/screening. They were very brief tests. And if you didn't know they were doing an assessment, you would have thought they were just doing some type of mobility warm ups. This video here shows a lot of the same movements they went through in the screening. They also did some ground force measurements using force plates.