Bellore was injured on Sunday against the Falcons. Due to a team-issued suspension of Gerald Hodges, Bellore was just one of two inside linebackers active against the Falcons. That forced S Vinnie Sunseri to replace him.
Bradford was originally drafted out of Arizona State by the Packers in the 4th round of the 2014 NFL Draft. After being inactive for all of his rookie season in 2014, he spent 2015 on the Packers' practice squad. Bradford appeared in the first four games of his career this season and had two tackles on defense and one tackle on special teams.
Bellore appeared in every game for the 49ers this season, starting ten. He had 82 tackles, four passes defended, a sack, an interception, and a fumble recovery in 2016.
Today, 49ers head coach Chip Kelly revealed that at least two other players will be lost for the season. They are WR Quinton Patton and TE Blake Bell.