Passing yards (season): Dan Marino, 1984, is the current leader with 5,084. Brees, Brady and Rodgers are all on pace to best that.
Quarterback rating (season): Peyton Manning holds the record with 121.1 in 2004. Rodgers is at 125.7 through 7 games.
Completion percentage (season): Brees in 2009 has the record of 70.6%; Rodgers is at 71.5% thus far, while Brees is at 70.9%.
Receiving yards (season): Jerry Rice in 1995 put up 1,848 yards. Wes Welker is on pace to get 2,093.
Receiving touchdowns (season): Randy Moss' 23 in 2007 are the all-time mark, but Megatron is on pace in 2011 to tie that mark.
Yards from scrimmage (season): CJ2K has the record of 2,509 yards set in 2009. But Matt Forte is surprisingly close in 2011 through 7 games, on pace for 2,494.

Whoops. Meant to make it a select all that apply poll, guess I'll switch it to "which record is most likely to fall"

Passing yards. It's a QB league now and defenses aren't allowed to play defense. Brees is on pace to shatter the record, not just break it. Receiving TDs is the least likely to be broken. I don't think Calvin ends up with 20 even (not to make it sounds like 20 TD catches isn't still ridiculous).

And I had no idea Matt Forte had that many yards.