Fantasy Football Sleepers 2013: Underrated Players to Keep an Eye on

As the NFL regular season approaches, many fans will be studying fantasy football mock drafts rigorously to find a potential steal for their squads. 

While many will be quick to pull the trigger on big names like Arian Foster, Calvin Johnson and Colin Kaepernick, there are a few sleepers that you might want to keep an eye on throughout the preseason that could prove to be of tremendous value.

Cordarrelle Patterson, WR, Minnesota Vikings 

Rookie Cordarrelle Patterson has stat-sheet stuffer written all over him. 

The 22-year-old rookie has speed for days, having run a 4.33 in the 40-yard dash at the NFL Scouting Combine. 

The Minnesota Vikings are also expected to feature Patterson as their primary kick returner, according to NFL.com's Kevin Patra.

With Percy Harvin gone, don't be surprised if Vikings head coach Leslie Frazier starts Patterson alongside Greg Jennings. 

Keep an eye on the rookie throughout the preseason, for you could end up with a late-round gem.

Michael Vick, QB, Philadelphia Eagles 

Michael Vick has a lot to prove this coming season.

After a tumultuous, injury-riddled 2012 campaign, some may believe that Vick is no longer a prime-time performer.

While he struggled last season, new head coach Chip Kelly's uptempo offense should bring out the best in Vick going forward.

In addition, Vick has taken steps to improve his core strength. According to PhiladelphiaEagles.com's Chris McPherson, Vick has added four pounds of muscle to his frame and his arm strength is still among the "league's best."

If Vick can beat out Nick Foles and Matt Barkley for the starting job in Philadelphia, he will have a major impact on many fantasy teams. 

Brandon Gibson, WR, Miami Dolphins

Brandon Gibson should put up big numbers for Miami during the 2013 season. 

Last season, with the St. Louis Rams, Gibson tallied 51 receptions, 691 yards and five touchdowns. 

Joining an offense directed by the flame-throwing Ryan Tannehill, Gibson should see a lot of long balls headed his way, especially in third-down situations. 

Plus, the defense will have to keep additional eyes on Mike Wallace, which will result in an abundance of opportunities for Gibson from the slot. 

Keep tabs on Gibson, for he may turn out to be one of the biggest steals of the fantasy football season.