Outside of the 2013-2014 era, the St. Louis/Los Angeles Rams have had quite the interesting streak of consistency at running back. If you allowed me to ignore those two seasons, then I could tell you that since Marshall Faulk in 1999, the Rams have only had three different players lead the team in rushing.
Faulk from 1999 to 2004.
The only issue of course being Tre Mason and Zac Stacy working their way in there somehow.
But even still, that’s a remarkably low number of names to lead a team in rushing over a 20-year period.