From what I've seen, if a player shows outstanding in any one of 3 areas coaches will notice and at least take a closer look at the player.
Arm Velocity: 90+
60 Time: Below 6.7
Exit Velocity: 90+
My 15 yr old grandson showcased Exit Velocity of 91 and was told he got himself on several coaches list to follow. Now he just has to continue to grow and proform well.