Online All-Time Leaderboards?

I've got all-time leader stats (career and single-season) for offfensive totals (things like TDs, rushing yards, etc.)

BUT, I'm still looking for:
1) Defensive leaders (e.g. most sacks in one season and in career)
2) Single-game leaders (e.g. most yards rushing in 1 game)
3) Leaders for "averages" (e.g. yards per rush, QB rating, etc.)

Anyone know of any good online sources for these stats? I'm trying to find the top 25 in each category.

Thanks!

Clay

Not everything you wanted but it's a start.

http://sports.canada.com/default.asp...ME-LEADERS.htm

Another resource you could use is the downloadable database from :

http://www.bballsports.com

You download the program and then access the database over the internet. I can't vouch for it since I tried using it for the basketball db but I didn't like the online part of it so I never used it again.