In his second season, Dickerson continued his onslaught on the NFL record book becoming a member of the 2,000-yard club. Twelve times in 1984 he gained more than 100 yards rushing, breaking the record of 100-yard games in a season held by O. J. Simpson. His 2,105 total yards rushing beat Simpson's 1973 NFL season record of 2,003 yards (Dickerson having reached 2,007 yards after 15 games), but since the NFL expanded the regular season from 14 to 16 games in 1978, Dickerson had the benefit of playing in two additional games. No one has since rushed for more yards in a single NFL season. Dickerson's 5.6 yards per carry led the Rams to a playoff berth in 1984.