From John Clayton's blog:
Franchise players: The league and the NFLPA officially agreed on the franchise numbers for 2007. Here they are:
Quarterbacks -- $12.615 million
Running backs -- $6.999 million
Safeties -- $4.49 million
Tight ends -- $4.371 million
Wide receivers -- $7.613 million
Cornerbacks -- $7.79 million
Defensive ends -- $8.644 million
Defensive tackles -- $6.775 million
Linebackers -- $7.206 million
Offensive linemen -- $9.556 million
Kickers -- $2.078 million
Since they are a reflection of the values placed on the upper echelon of each position by teams - seems odd to me that top running backs are paid less (and thus, deemed less valuable) than top cornerbacks and wide receivers. Offensive linemen don't surprise me. Defensive ends & linebackers more valued than running backs? I don't know enough about NFL salaries to debate the specifics, but find this very interesting.
Would like to see the same breakdown for baseball, by position.