Marlon Humphrey of the Ravens was not present for the open portion of practice on Friday.
Brandon Stephens (quadriceps) missed practice for the second day in a row.
The Ravens' top four corner-backs are all either unavailable or unsure for Week 2 of the season.
Humphrey (groyne) missed practice on Thursday.
Kyle Fuller suffered a season-ending knee injury against the New York Jets on Sunday.
Marcus Peters (knee) took part in full practice on Thursday but has yet to play in a game.
The Ravens' only healthy corner-backs on the 53-man roster are rookies Jalyn Armour-Davis and Damarion Williams.
He's unlikely to play Sunday after missing two straight sessions.