McGhin was also signed from the Panthers, although the Bills didn't bring him in until April 23. McGhin played two games last season for Carolina.
NFL teams have the option of practicing as one with an 80-man roster, or splitting up into separate squads and maintaining a 90-man roster limit. It appears the Bills are on their way to the former.
A total of 24 players across 14 teams in the NFL have been placed on the reserve/COVID-19 list as of Monday.