Marshall Faulk (1999-2001) and James Brooks (1988-1990) once had three straight seasons where they carried the ball over 100 times and averaged more than 5.0 yards per carry. Who are the only other two running backs who have done this since the merger in 1970 (not just one season, but three consecutive)? Both are active players, the streaks are active, and they play in the same division.
Gus Edwards and Nick Chubb. Note that the question specifically asked about running backs. Two quarterbacks have also did this. Michael Vick had three straight, and Cam Newton is the only player with four straight such seasons (in the first four years of his career).