It doesn’t matter how many times under Johnson, only how many under Mac. The answer would be 3 times and so far two “all stars” with Darnold looking like he could be one eventually as well.
8 times Robertson, Brick,Gholston, Sanchez, Milliner, Williams, Adams, Darnold So 50% have been pro bowlers or (Darnold) potential pro Bowlers. 3 total busts. One has a thread debating if he's a bust (Sanchez).
92 plus 33 is 125 All Stars. If you multiply that by 14 then it is 1750. Macc has drafted 1750 All Stars.
Profootballreference https://www.pro-football-reference.com/teams/nyj/draft.htm 29 times for teams entire history