Throughout the history of football, there have been plenty of great 1-2 punches at the running back position. Mr. Inside and Mr. Outside in Doc Blanchard and Glenn Davis are the first that come to mid. Larry Csonka and Mercury Morris with the Miami Dolphins. Franco Harris and Rocky Bleier with the Pittsburgh Steelers.
Even Jim Brown and Bobby Mitchell with the Cleveland Browns come to mind.
The duo of Najee Harris and Jaylen Warren isn’t anywhere close to that standing just yet — if ever — but they do form one of the best duos in the NFL today.