Raiders shopping list

1. Cornerback

The reason: Three-time Pro Bowler Nnamdi Asomugha isn't expected back for a ninth season because of his steep asking price.

The prospects: Ras-I Dowling, Virginia; Jimmy Smith, Colorado; Brandon Harris, Miami; Davon House, New Mexico State; Buster Skrine, Tennessee-Chattanooga.

2. Quarterback

The reason: Starter Jason Campbell and backup Kyle Boller turn 30 this season and aren't under contract beyond 2011.

The prospects: Jake Locker, Washington; Colin Kaepernick, Nevada; Christian Ponder, Florida State; Andy Dalton, Texas Christian; Ryan Mallett, Arkansas.

3. Offensive tackle

The reason: Langston Walker, Mario Henderson and Khalif Barnes are free agents, and none is a certainty to be re-signed.

The prospects: Nate Solder, Colorado; Benjamin Ijalana, Villanova; James Carpenter, Alabama; Marcus Gilbert, Florida.