The Vikings picked up a better quarterback in the offseason, drafted a good receiver and feature perhaps the best fantasy player in the league. Yet, uncertainty surrounds them thanks to their flirtation of signing Brett Favre out of retirement.

Quarterbacks: If he stays healthy, Sage Rosenfels has the potential to turn in a QB2-type season and is a definite improvement over Tavaris Jackson. Given his past injury history, he might be too risky as your backup but a possible bargain as a QB3, unless … Favre does join the team. For the first few games in 2008 with the Jets, Favre picked up where he left off in 2007 until the walls came crashing down with late-season losses and interceptions aplenty. If he does return, remember that he now has an injury history and will still add to his NFL-record interception total. Don’t rely on him as anything more than a low-end QB2, and be ready to bail if necessary.

Running backs: Adrian Peterson is a no-brainer top-three pick. There’s always the concern he might get hurt, given his heavy workload, but that’s a minor concern compared with what he brings to the table. And if does get more involved in the passing game (he only had 21 receptions last year), look out. Chester Taylor is still backing up Peterson, and besides being excellent Peterson insurance, should get enough touches to warrant RB4 or RB5 consideration.

Wide receivers: With either Rosenfels or Favre passing to him, Bernard Berrian will benefit with more receptions, but maybe not enough to push him above a solid WR3. The Vikes drafted Percy Harvin in the first round, and though he won’t be the second coming of Randy Moss, he might be worth a late pick as an WR5. Harvin’s arrival might push Sidney Rice out of the draft; if the rookie doesn’t earn the starting job, Rice is a WR5 at best.

Tight end: Visanthe Shiancoe turned in the best season of his career with 42 receptions, 596 yards and 7 touchdowns. He will benefit from an improved passing game and can be considered a high-end TE2 or even a low-end TE1.

Kicker: Ryan Longwell kicks in a dome on a team that moves the ball but doesn’t pass for many touchdowns. He might reach 127 points again, but he’s still a first-rounder nonetheless.