With the fourth day of the NFL free agency period kicking off today, here's a look at the best free agents still available:

Quarterback:

1. Ryan Fitzpatrick, Buffalo Bills
2. Jason Campbell, Chicago Bears
3. Charlie Batch, Pittsburgh Steelers
4. Josh Johnson, Cleveland Browns
5. Brian Hoyer, Arizona Cardinals

Running Back:

1. Michael Turner, Atlanta Falcons
2. Ahmad Bradshaw, New York Giants
3. Felix Jones, Dallas Cowboys
4. Peyton Hillis, Kansas City Chiefs
5. Cedric Benson, Green Bay Packers

Fullback:

1. Corey McIntyre, Buffalo Bills
2. Greg Jones, Jacksonville Jaguars
3. Spencer Larsen, New England Patriots
4. Josh Baker, New York Jets
5. Brock Bolen, Jacksonville Jaguars

Wide Receiver:

1. Greg Jennings, Green Bay Packers
2. Victor Cruz, New York Giants (1st Round RFA)
3. Darrius Heyward-Bey, Oakland Raiders
4. Laurent Robinson, Jacksonville Jagurs
5. Austin Collie, Indianapolis Colts

Tight End:

1. Dustin Keller, New York Jets
2. Fred Davis, Washington Redskins
3. Dennis Pitta, Baltimore Ravens (2nd Round RFA)
4. Chris Cooley, Washington Redskins
5. Dallas Clark, Tampa Bay Buccaneers

Offensive Lineman:

1. Jake Long, Miami Dolphins
2. Sebastian Vollmer, New England Patriots
3. Brandon Moore, New York Jets
4. Andre Smith, Cincinnati Bengals
5. Eric Winston, Kansas City Chiefs

Defensive End:

1. Dwight Freeny, Indianapolis Colts
2. Osi Umenyiora, New York Giants
3. John Abraham, Atlanta Falcons
4. Matt Shaughnessy, Oakland Raiders
5. Marcus Spears, Dallas Cowboys

Defensive Tackle:

1. Casey Hampton, Pittsburgh Steelers
2. Sedrick Ellis, New Orleans Saints
3. Ma'ake Kemoeatu, Baltimore Ravens
4. Richard Seymour, Oakland Raiders
5. Alan Branch, Seattle Seahawks

Linebacker:

1. Karlos Dansby, Miami Dolphins
2. Brian Urlacher, Chicago Bears
3. Rey Maualuga, Cincinnati Bengals
4. Nick Barnett, Buffalo Bills
5. Kevin Burnett, Miami Dolphins

Cornerback:

1. Chris Gamble, Carolina Panthers (Retiring)
2. Brent Grimes, Atlanta Falcons
3. DeAngelo Hall, Washington Redskins
4. Antoine Cason, San Diego Chargers
5. Nnamdi Asomugha, Philadelphia Eagles
   

Safety:

1. Ed Reed, Baltimore Ravens
2. Charles Woodson, Green Bay Packers
3. Bernard Pollard, Baltimore Ravens
4. Kerry Rhodes, Arizona Cardinals
5. Quintin Mikell, St. Louis Rams

Punter:

1. Shane Lechler, Oakland Raiders
2. Brian Moorman, Dallas Cowboys
3. Donnie Jones, Houston Texans
4. Reggie Hodges, Cleveland Browns
5. Britton Colquitt, Denver Broncos

Kicker:

1. Phil Dawson, Cleveland Browns
2. Lawrence Tynes, New York Giants
3. Nick Folk, New York Jets
4. Nate Kaeding, Miami Dolphins
5. Jason Hanson, Detroit Lions