As of the start of the 2012 season:
1) Eric Dickerson - 2105 in 1984
2) Jamal Lewis - 2066 in 2003
3) Barry Sanders - 2053 in 1997
Yes, in the NFL, negative rushing yards are subtracted from a running back's total rushing yards. If a running back loses yards on a carry, those negative yards are counted against their overall rushing total for that game and season. This means that a player's rushing yards reflect both positive and negative yardage from their carries.
jamal anderson
Stephen Davis with 1318 rushing yards for the season.
For a career that is Michael Vick with 7.1 yards per rushing attempt (through 10 games of the 2010 season). Most of the career leaders in this category are quarterbacks. The running back with the highest yards per rushing attempt is Marion Motley at 5.7. For a single season, the record is held by Vick of the 2006 Falcons and running back Beattie Feathers of the 1934 Bears with 8.4 yards per rushing attempt.
Frank Gore with 110 rushing yards.
terry Allen
Terrel davis
Terrell Davis of the Denver Broncos had the most rushing yards in 1998. He had 2008 yards and was the fourth running back in NFL history to rush for over 2000 yards.
Joseph Addai of the Colts who had 77 rushing yards
Mike Anderson with 251 rushing yards against the New Orleans Saints on December 3, 2000.
Chris Johnson - Tennesee Titans - 1,509 yds as of December 6
Emmitt Smith. Smith rushed for 937 yards in his rookie season for the 1990 Dallas Cowboys and 937 yards in his final season for the 2004 Arizona Cardinals.