Updated Dec. 18, 2011 @ 12:42 p.m. ET

Byes: none

Here are our fantasy rankings for quarterbacks:

1. Drew Brees, Saints at Vikings
2. Aaron Rodgers, Packers at Chiefs
3. Tom Brady, Patriots at Broncos
4. Tony Romo, Cowboys at Buccaneers
5. Eli Manning, Giants vs. Redskins
6. Matt Ryan, Falcons vs. Jaguars
7. Cam Newton, Panthers at Texans
8. Matthew Stafford, Lions at Raiders
9. Tim Tebow, Broncos vs. Patriots
10. Ben Roethlisberger, Steelers at 49ers — INJ
11. Andy Dalton, Bengals at Rams
12. Michael Vick, Eagles vs. Jets
13. Joe Flacco, Ravens at Chargers
14. Philip Rivers, Chargers vs. Ravens
15. Ryan Fitzpatrick, Bills vs. Dolphins
16. Rex Grossman, Redskins at Giants
17. Carson Palmer, Raiders vs. Lions
18. Mark Sanchez, Jets at Eagles
19. T.J. Yates, Texans vs. Panthers
20. Josh Freeman, Buccaneers vs. Cowboys
21. Matt Hasselbeck, Titans at Colts — INJ, UP (ACTIVE)
22. Christian Ponder, Vikings vs. Saints
23. Matt Moore, Dolphins at Bills — INJ (ACTIVE)
24. Caleb Hanie, Bears vs. Seahawks
25. Tavaris Jackson, Seahawks at Bears
26. Dan Orlovsky, Colts vs. Titans
27. Kyle Orton, Chiefs vs. Packers
28. Alex Smith, 49ers vs. Steelers
29. Blaine Gabbert, Jaguars at Falcons
30. Seneca Wallace, Browns at Cardinals
31. John Skelton, Cardinals vs. Browns
32. Kellen Clemens, Rams vs. Bengals
33. Sam Bradford, Rams vs. Bengals — INJ, DOWN (INACTIVE)
    
34. Kevin Kolb, Cardinals vs. Browns — INJ (INACTIVE)

Not listed: Jay Cutler, Bears; Peyton Manning, Colts; Colt McCoy, Browns

The above player rankings are based on expectations for this week only, not for the entire season, taking into account this week's specific matchups and injuries. The initial rankings are compiled before the release of the NFL's early injury report and are updated Thursday to reflect the status of each player.

We base our rankings on the following scoring system: For skill-position players, one point for every 10 rushing/receiving yards, one point for every 30 passing yards, six points for a TD run or catch, four points for a TD pass, two points for a two-point conversion run or catch, two points for a two-point conversion pass. For kickers, three points for FGs of 18-39 yards, four points for FGs of 40-49 yards, and five points for FGs of 50-plus yards. Defensive rankings are based primarily on points allowed, yardage allowed and sack potential.

Glossary of notations

INJ — player has an injury that may affect productivity or availability.
ILL — player has an illness that may affect productivity or availability.
UP — player was moved up on draft board after original posting.
DOWN — player was moved down on draft board after original posting.
Not listed — player is temporarily sidelined due to injury or suspension but otherwise would be ranked.
ACTIVE — on game day, player has been designated active (posted shortly before kickoff, when available).
INACTIVE — on game day, player has been designated inactive (posted shortly before kickoff, when available).

Players and/or notations added after the original posting are shown in boldface.

Note: Remember to check back for late-week and weekend updates, as well as game inactives (when available) in the 90 minutes preceding the 1 p.m. Sunday kickoffs. You'll also find regular updates in our live fantasy injury reports on Sundays.