Double-Digits! Number 10 your Dallas Stars! (Also people this is a series...I see you doing your favourite teams - Pittsburgh and San Jose for instance - I will get to you haha! I mean still do your own to compare though if you want)
NOTE: I'm honestly impressed with how good Dallas's recent prospect retention is. Almost their entire D-corps is homegrown, and their forwards prospects look pretty great.
NOTE: The 2017 draft seems to be the gold mine so far: they got Heiskanen, Oettinger, and Robertson. Also, I literally looked everywhere I could and only found 7 D.