Exum Jr. (6-0, 219) originally joined the 49ers after signing with the team on November 7, 2017 where he saw action in two games (one start) and registered three tackles. He was originally drafted by the Minnesota Vikings in the sixth round (182nd overall) of the 2014 NFL Draft. In his three years with Minnesota (2014-16), he appeared in 27 games (two starts) and registered 18 tackles, two fumble recoveries and one forced fumble along with 13 tackles on special teams. After spending the entire 2016 season on the Injured Reserve List, he was waived by Minnesota on September 16, 2017.