Mitchell, 31, joined the 49ers on a four-year deal in February of 2017. He started all 16 games that season, and the first 12 in 2018 before the coaching staff decided to sit him in favor of then-second-year defensive tackle D.J. Jones.
The 49ers decided not to pick up Mitchell's contract option and even reportedly tried to trade him rather than release him immediately.
The Houston Texans made Mitchell a third-round selection out of Arizona in 2010. He registered 28 combined tackles through 14 games and 12 starts with the 49ers in 2018. Mitchell has recorded 268 combined tackles, 6.5 sacks, nine passes defensed, and a forced fumble through his nine NFL seasons. He spent three seasons with the Miami Dolphins before joining the 49ers.
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