The San Francisco 49ers announced on Thursday that they have promoted DB Greg Mabin to the active roster from the team's practice squad and signed CB Tarvarus McFadden to the practice squad.
Mabin (6-2, 200) has appeared in six games (one start) this season with the 49ers and registered 10 tackles and one forced fumble. He was waived by the team on October 30, 2018 and signed to the team's practice squad on November 1.
McFadden (6-2, 205) originally signed with the 49ers as an undrafted rookie free agent on May 1, 2018. He was waived by San Francisco on September 1, 2018, signed to the Indianapolis Colts practice squad on September 11 and waived from the team on September 25.
A 21-year-old native of Plantation, FL, McFadden played collegiately at Florida State University where he appeared in 33 games (26 starts) and recorded 54 tackles, 16 passes defensed, eight interceptions and three tackles for loss during his three seasons with the Seminoles. As a junior in 2017, he started all 13 games and registered 30 tackles and 10 passes defensed and earned Second-Team All-ACC honors.