According to head coach Todd Bowles, Hackenberg will not play unless current starter Bryce Petty gets hurt, Brian Costello of the New York Post reports.
If Petty were to get hurt, veteran Ryan Fitzpatrick would become the Jets' starter with Hackenberg presumably becoming the team's backup. Such a prospect makes Hackenberg's chances of becoming the starter at any point this season quite low, making him a non-factor in most fantasy formats.