The Raiders made the moves Friday citing failed physicals for both players.
Roach signed with the Raiders prior to the 2013 season and started every game that year. But he missed the entire 2014 season with concussion symptoms.
The 29-year-old Roach originally entered the NFL as an undrafted free agent in 2007 and has played in 96 games with the Bears and Raiders. The Northwestern product has 346 tackles, nine sacks and one interception.
Young played 18 games in two seasons with the Raiders. He ended both seasons on injured reserve.
The Raiders also released running back Maurice Jones-Drew, who announced his retirement on Twitter Thursday.