Brandon Beane and his staff are filling out the 90 man roster.
The Bills have signed linebacker Mike Bell, who has been on and off the team from 2019-20.
Bell, who went to college at Fresno State, had 198 tackles, 8.5 tackles for loss, four interceptions in three seasons.
The team also signed offensive lineman Steven Gonzalez to a one-year deal.
Gonzalez played 50 games at guard at Penn State from 2018-2019.