Part of the reason for the numerous needs has been self-induced (trading receiver Percy Harvin, releasing cornerback Antoine Winfield, failing to re-sign middle linebacker Jasper Brinkley), but others are just natural (defensive tackles aging, left guard struggling, limited depth at outside linebacker, etc.).
With that in mind, the Vikings' mock big board is the focus here.
Middle linebacker and wide receiver are the top two needs, but Minnesota shouldn't automatically draft that way, especially if the draft doesn't dictate that it should.
This isn't a top-heavy draft, but it is deep.
With its first-round picks, the Vikings should find two players who can contribute immediately and they may even find a contributor or two in the second and third rounds.
This slideshow will lay out the top five players at each position and the Vikings' big board. The big board will list the top 10 players relative to their expected availability when Minnesota picks (i.e., Luke Joeckel is projected as a top-five player, he won't appear on the Vikings' big board).
The other boards will feature the top five players at each position (kicker and punter excluded).