The Raiders on Thursday confirmed the signings of running back Rashad Jennings and safety Reggie Smith, moves first reported earlier this week.
Jennings, 28, started six of the 10 games he played for the Jacksonville Jaguars last season. He spent his first three NFL seasons with the Jaguars as a backup to Maurice Jones-Drew.
Darren McFadden remains the Raiders primary running back. Jennings is expected to compete for the backup spot occupied by Mike Goodson last season.
Smith played in 45 games for the 49ers from 2008-11. He signed with the Carolina Panthers last season but failed to make it past training camp.
Smith will be among the handful of players competing for playing time at safety, as well as special teams. Tyvon Branch is locked in at strong safety. The Raiders still are searching for someone to replace jettisoned free safety Michael Huff.