Crowder has been placed on the reserve/COVID-19 list, per the NFL's official transaction log.
It remains to be seen how long Crowder, who had been viewed as day-to-day with a groin injury, might miss, but he'll be away from the team until he clears the league's COVID protocols. In his absence, ESPN's Rich Cimini notes that rookie Elijah Moore could see added reps in the slot for the Jets, while Corey Davis and either Keelan Cole or Denzel Mims handle the team's outside wideout duties.