Lewis was a non-participant during Thursday's practice due to a knee injury.
It's not great news for the veteran, as he was listed as a limited participant just a day earlier. Lewis appears in jepoardy of missing Sunday's game against Detroit, as he'll likely need to log some practice time Friday in order to suit up. With both Lewis and Jace Sternberger (concussion) missing practice Thursday, Robert Tonyan is currently the only healthy tight end on the roster.