By David Sabino
September 28, 2012

Unlike more traditional fantasy football leagues in which users have to play for season-long trends, weekly salary cap formats allow players to take advantage of hot tips and the best matchups of the moment. The more informed you are as a football follower, the more success you'll have. That's why it's important to know what's going on across the league, which is where SI's experts come in. Here is a position-by-position look at some of the best bargains entering Week 4, with prices based on current FanDuel 10-team leagues.

If you're looking for a salary cap challenge, test your skills by going head-to-head with SI's Peter King in the Peter King Fantasy Challenge.

Quarterbacks: The two highest priced quarterbacks are Drew Brees and Aaron Rodgers, who'll battle it out Sunday at Lambeau Field with the Saints' and Packers' seasons on the line. Neither will have an easy time. Brees will have to deal with Clay Matthews, B.J. Raji and the rest of Green Bay's motivated defense. And while Rodgers will go against a Saints defense that has been terrible through three games, he'll be playing behind an offensive line that has also been poor. The value-pick quarterbacks include Washington's Robert Griffin III against Tampa Bay, Cincinnati's Andy Dalton at Jacksonville and Buffalo's Ryan Fitzpatrick and his league-leading eight touchdown passes at home against New England. For the lowest-priced option of the week, consider Arizona's Kevin Kolb at home against Miami.

Running backs: Houston's Arian Foster is the cream of the crop this week against the Titans, but the underappreciated Cedric Benson will run well for the Packers against the Saints. In a battle of two of the league's most impressive rookie running backs, look for Tampa Bay's Doug Martin to outduel Washington's Alfred Morris with the Redskins still smarting from losing defensive linemen Brian Orakpo and Adam Carriker. True value picks include multidimensional Atlanta back Jacquizz Rodgers against Carolina and Arizona's Ryan Williams, who will see the bulk of the carries with Beanie Wells on injured reserve and who is a great value option against a good-but-not-great Miami defense.

Wide receivers: Victor Cruz is poised to have another strong game for the Giants against the Eagles, but he comes with a hefty price tag. Further down the price list you'll find fellow Giant Ramses Barden, an affordable option who is a tough cover in the corner of the end zone for any NFL defensive back. Also available on the cheap is über-athletic Viking Jerome Simpson, who returns this week from a three-game league-mandated suspension. Simpson joins an offense dripping with promise, as Adrian Peterson has shown he's miraculously recovered from shredding his knee on Christmas Eve and quarterback Christian Ponder has made significant strides in his sophomore season.

Tight ends: This week New England introduced Grönk Flakes, a breakfast cereal named after the Patriots' all-world tight end, who heads home to Buffalo this Sunday to take on the surprising Bills, who enter the contest ahead of the Pats in the AFC East standings. Banking on Rob Gronkowski's homecoming will be cash well spent, but if you're looking for a little more value consider Cincinnati's Jermaine Gresham against the Jaguars, Houston's Owen Daniels against the Titans and Atlanta's ageless Tony Gonzalez against the Panthers.

Kickers: You could blow extra funds on Green Bay's Mason Crosby, New England's Stephen Gostkowski or New York's Lawrence Tynes, but why bother when Minnesota's Blair Walsh, Atlanta's Matt Bryant and Houston's Shayne Graham are all among the minimum wage kickers?

Defense: It's hard to find a better matchup this week than the hard-hitting Cardinals against the Dolphins, but the Cowboys against mistake-prone Jay Cutler and the Bears is very close.

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