The Raiders signed Mike Jenkins on Tuesday to pair with the recently added Tracy Porter to add experience to an untested secondary.
Oakland also signed free- agent safety Usama Young and brought back free-agent defensive end Andre Carter for a second season.
Before these latest additions of former starters in the NFL, the other cornerbacks on the Raiders' roster had combined for four career starts.
Last offseason, general manager Reggie McKenzie gave one-year contracts to two veteran cornerbacks coming off injuries, Ron Bartell and Shawntae Spencer, and neither one finished the season on the active roster.
Bartell broke his left shoulder blade in the season opener and missed the next seven games. After starting five games when he returned, Bartell was cut in December when the Raiders wanted to look at younger cornerbacks.
Spencer played two games before being sidelined by a season-ending sprained right foot.
With the decision to cut Michael Huff last month, the only cornerbacks on the roster until last week were Phillip Adams, Chimdi Chekwa, Brandian Ross, Cory Nelms and converted running back Taiwan Jones.
The Raiders' defense has undergone a near-complete overhaul after the team allowed the fifth-most points in the NFL last season.
Only three starters from that unit are back in 2013 as the focus of the offseason has been on rebuilding a struggling defense.
Former NFL players trying to sue the league over concussion-linked injuries argued in a Philadelphia court that the NFL "glorified" violence and profited from damaging hits to the head.
Players' lawyer David Frederick also accused the NFL of concealing the emerging science about concussions over several decades, even after creating a Mild Traumatic Brain Injury committee in 1994.
The Detroit Lions officially signed former 49ers kicker David Akers and bid farewell to 21-year veteran Jason Hanson.
Pittsburgh Steelers coach Mike Tomlin has been named to the NFL's competition committee.
Brady Quinn is the new backup quarterback for Seattle after agreeing to terms with the Seahawks.
A source familiar with talks in a private meeting in Albany with New York officials says the NFL agrees to further review its policies to avoid discrimination and harassment based on sexual orientation.
Isner, Verdasco win in U.S. Clay Court
Fifth-seeded John Isner, the second-ranking U.S. player, defeated Ryan Harrison 7-6 (4), 6-4 in the U.S. Men's Clay Court championships in Houston.
Sixth-seeded Fernando Verdasco of Spain got a 7-6 (5), 6-2 victory over Steve Johnson of the United States
In Casablanca, Morocco, two-time defending champion Pablo Andujar was ousted from the Grand Prix Hassan II, losing 6-4, 2-6, 6-3 in the first round to qualifier Pablo Carreno-Busta in a match between Spaniards.
Amanda Kessel scored the winner early in the third period, and the United States beat Canada 3-2 in the gold-medal game of the women's world hockey championship in Ottawa.
Christen Press scored twice, and the U.S. women's team beat the Netherlands 3-1 in an exhibition soccer match in The Hague, Netherlands, that extended the Americans' unbeaten streak to 31 games.
University of Washington tight end Austin Seferian-Jenkins has been charged in Seattle with driving under the influence of alcohol. He was indefinitely suspended by the Huskies following the arrest.