The Raiders obviously need an upgrade to their current starting group of players. Some positions are set in stone but every position needs some depth. There are at least 4 starting positions that must be addressed this offseason and need immediate upgrades plus obvious depth.
This slideshow discusses the positions most critical to upgrading the Raiders and making them a playoff team.
However, I do want to point out I've stayed away from the QB position because we all know for the most part who'll be on the roster come training camp at QB.