Iafallo (undisclosed) won't play against Vegas on Monday, Mitchell Clinton of the Jets' official site reports.
Iafallo is dealing with an injury and didn't participate in Monday's morning skate. After being summoned from AHL Manitoba on Sunday under emergency conditions, Brayden Yager and Nikita Chibrikov will replace Iafallo and Vladislav Namestnikov (undisclosed) in Monday's lineup against the Golden Knights.