Nikolaj Ehlers had previously been day-to-day during the Jets' training camp and has yet to play in a pre-season game. His injury was the result of an incident in the gym, after which he began experiencing back spasms. He had previously been skating with the Jets in a non-contact jersey.
Perfetti, on the other hand, had been healthy prior to taking a hit on Wednesday night's game against the Calgary Flames, in which he took a direct shot to the head. He missed practice yesterday, but appears that he will be okay after being in regular drills today.