Defensive end Lance Johnstone rejoined the Raiders, leaving the Minnesota Vikings after five seasons for a free-agent contract with Oakland. Johnstone has 70 sacks in his 10 NFL seasons -- the first five with the Raiders, who selected him in the second round out of Temple in 1996. He had a career-high 11 sacks with Oakland in 1998 and again with Minnesota in 2004. Johnstone, who left Oakland as a free agent in 2001, led the Vikings with 7? sacks last season despite playing 12 games.