Only nine NFL running backs have ever rushed for over 900 yards in a six-game span, and the incomparable Jim Brown actually did it twice.
 
Running Back
Timeframe
Att.
Yards
Avg.
Earl Campbell
10/12/80-11/16/80
195
1,076
5.5
Terrell Davis
9/13/98-10/25/98
180
1,075
6.0
Eric Dickerson
11/4/84-12/9/84
162
1,044
6.4
Walter Payton
10/30/77-12/4/77
167
989
5.9
Barry Sanders
11/16/97-12/21/97
134
950
7.1
Jim Brown
9/15/63-10/20/63
126
931
7.4
Brown
9/28/58-11/2/58
133
928
7.0
Larry Johnson
11/13/05-12/17/05
181
912
5.0
O.J. Simpson
9/21/75-10/26/75
171
911
5.3
Jamal Lewis
9/14/03-10/26/03
151
908
6.1