The Las Vegas Raiders have had an outstanding offseason, addressing nearly every one of their needs. In actuality, they did. The Raiders' front office used free agency and the NFL Draft to add talent to every single position group on its roster. At least one player was added to every position group. Raiders' Wise Move Darrell Craig Harris, ON SI Las Vegas ' moves in free agency were one thing, but the draft was another. Las Vegas just wrapped up a masterful draft, reeling in talent and depth at multiple positions. Even after having arguably the best free agency of any team in the league, the Raiders still had holes on its roster. Many of those holes were filled after three nights of the NFL Draft. The Raiders ' roster still has a long way to go, but they thoroughly addressed their depth at many positions in the draft. Most notably, the Raiders eliminated a need that was a few months or a one bad play away from becoming a dire issue.…