Carlos Rogers will join Tarell Brown, who signed on March 14. As it stands now, Rogers should be a starting corner opposite Brown and move inside in nickel packages, with last year's top draft pick, D.J. Hayden, coming in for Rogers.
"I don't want to say you can plug anybody outside, but being an outside corner is easier to learn," Rogers said in a conference call. "Nickel, you're dealing with the linebackers, you're dealing with the D-line, you're dealing with your corners and your safeties, so it's going to be a big part of what I need to do. I need to learn all the terminology and get the nickel spot down.
"I'm going to have a big opportunity to compete on the outside for a starting spot as a corner. For me, personally, my biggest role is going to be making sure I've got all the nickel stuff down."
Rogers, who turns 33 on July 2, was originally a first-round draft pick, No. 9 overall, of Washington in 2005 and came to San Francisco in 2011. In three seasons with the 49ers, he had nine interceptions and was a Pro Bowler.
He said he is excited to be reunited with Brown after being cut by the 49ers.
"It's going to be fun," he said. "We're two older guys that can bring experience, can bring leadership, can bring a lot of stuff to the table. I've played in a lot of different defenses and it's not hard to come over here and learn this defense and this terminology. We were a big part of the puzzle that turned San Francisco's defense around, so hopefully we can translate that over here and be even better.
"My focus is I want to continue to win and I want to continue to be a big part of helping to turn this organization around, like I did in San Francisco and continue to win and try to get to that Super Bowl and win it. I don't have any hatred for San Francisco. I had three great years of my career there."
Rogers is the 11th different free agent to sign with the Raiders since the new league year began on March 11. Oakland has also re-signed four of its own free agents and acquired quarterback Matt Schaub in a trade for a sixth-round draft pick.
Entering Monday, the Raiders had little more than $13 million in salary cap space, according to ESPN Stats & Information data.
"The Raiders have been one of the teams that have been more active in the offseason, trying to turn things around," Rogers said. "I see where this team is going and it wasn't hard to come here and finalize the deal. Especially playing with Tarell. And I have been good friends with Charles Woodson since I've been in college. It was easier to come here and play with them. Plus, I just have to move myself from one place to another, right across the bay."