The Raiders announced the retaining of three exclusive-rights free agents on Monday.
Offensive lineman Alex Parsons, defensive back Brandian Ross and running back Jeremy Stewart have signed their respective exclusive-rights contracts.
Parsons, a member of the Raiders' practice squad in 2010 and 2011, played in all 16 games last season, starting the season opener at center in place of the injured Stefen Wisniewski. Parsons played 120 total offensive snaps in 2012.
Ross, who was signed off Green Bay's practice squad on Sept. 19, played in 14 gamed for the Raiders, starting the season finale at right cornerback against the Chargers. He started one game and had 174 defensive snaps for the season, finishing with 14 tackles. He could be looked at to make the switch to free safety this season.
Stewart, who was on the Raiders practice squad the first nine weeks, replaced Taiwan Jones on the depth chart and played in four games. He rushed for 101 yards on 25 carries, caught eight passes for 62 yards and also returned three kickoffs for 43 yards.
The Raiders began their voluntary offseason workouts at their Alameda facility on Monday.