The Raiders have released second-year cornerback DeMarcus Van Dyke and replaced him on the roster with seven-year veteran cornerback Joselio Hanson, as the team began its first practice with a 53-man roster Monday morning.Van Dyke was a third-round pick, No. 81 overall, out of Miami in 2011 after running a 4.28-seconds 40-yard dash at the Combine. Having appeared in 14 games as a rookie, he is not eligible for the practice squad.Hanson, 31, spent one season with the 49ers as an undrafted free agent out of Texas Tech in 2004 before playing from 2006 through 2011 with Philadelphia. He has appeared in 104 career games, with 19 starts, and has four interceptions and 3 12 sacks.He played in 16 games for the Eagles last year, starting one, and, according to STATS Inc., had a "burn rate" of 50, having surrendered completions on 21 of 42 targets for 232 yards with two touchdowns, no interceptions and a passer rating of 82.6 against.In his last four seasons combined, Hanson has given up completions on 54.5 percent of his targets for 5.3 yards-per-attempt with nine TDs and four interceptions and a 76.5 rating against.Van Dyke, meanwhile, had a burn rate of 43.8, on 14 of 32 targets for 167 yards, one touchdown, on INT and a 57.7 rating against.Both had one penalty last year, though Van Dyke had two with just the one enforced.Hanson served a four-game suspension in 2009 for violating the league's drug policy, claiming to have taken a diuretic, rather than steroids. He is one of four new Raiders since the team made its initial cut to 53 players on Friday, along with fellow defensive back Phillip Adams, linebacker Keenan Clayton and offensive tackle Willie Smith.