To make roster room, the 49ers have released defensive back Antone Exum Jr.
The Houston Texans made Mitchell a third-round selection out of Arizona in 2010. He has recorded 268 combined tackles, 6.5 sacks, nine passes defensed, and a forced fumble through his nine NFL seasons.
Mitchell, 32, spent three seasons (2014-16) with the Miami Dolphins before initially signing with the 49ers in 2017. He remained with San Francisco for two seasons (2017-18), but the team declined to pick up his two-year option after the 2018 season.
Mitchell started 28 games during his two seasons with the 49ers. He spent the 2019 offseason with the Seattle Seahawks and appeared in all four preseason games before being released on August 31 and announcing his retirement on November 7.
Exum re-signed with the 49ers on December 4. He appeared in seven games and recorded two tackles on defense and three special teams tackles with San Francisco this season.
Related News
More San Francisco 49ers News
-
49ers signing TE Jack Stoll to practice squad ahead of Dolphins game
The San Francisco 49ers are signing veteran tight end Jack Stoll to the practice squad, according to NFL Network's Mike Garafolo. The #49ers are signing veteran TE Jack Stoll to their practice squad. The former #Eagles undrafted free agent played 15 games for the #Saints last... -
49ers announce roster moves ahead of Week 2
The San Francisco 49ers have promoted tight end Brayden Willis to the active roster and signed defensive lineman McKinnley Jackson to the team's practice squad. CBS Sports' Matt Zenitz first reported Jackson's signing. Willis' promotion follows tight end Jake Tonges' knee... -
49ers place TE Jake Tonges on IR, announce other roster moves
The San Francisco 49ers announced they have promoted wide receiver KhaDarel Hodge from the practice squad to the active roster and signed tight end Jack Stoll to the practice squad. To make room for Hodge on the active roster, the 49ers placed tight end Jake Tonges on injured... -
49ers announce roster moves ahead of Week 1 clash vs. Rams
The San Francisco 49ers announced the following roster moves ahead of kickoff against the Los Angeles Rams in Melbourne, Australia. Placed on injured reserve: DT Alfred Collins Elevated from the practice squad: WR KhaDarel Hodge DE Ogbo Okoronkwo Collins suffered a...