Jack went to my high school so I've followed him closely. He has electric stuff - tops out mid 90s and steadily 92-93. His dad would have been unstoppable with an arm like that (Jack is a righty though)! Great slider in the mid 80s which is something NJ high school sees about once a decade. He would've been a fringe 1st round pick if he didn't say he was near 100% to go to Vandy. The rub is he's probably somewhere around 6' and while his mechanics are terrific, he throws with a LOT of effort. I'll be rooting for him but we'll see how he develops!
Honestly his profile is a lot like Rick Porcello, another Vandy commit from NJ who WAS drafted in the first round. We faced Porcello when he was just a soph and he was just on another level - but we beat them (he didn't start and came in down 5-0 already but who's counting?)!