This is my opinion of the 50 Best Running Backs in the history of the NFL!
http://www.ranker.com/list/best-nfl-running-backs-of-all-time/connorgrandy,
Barry Sanders
Earl Campbell
Emmitt Smith
Eric Dickerson
Gale Sayers
Jim Brown
LaDainian Tomlinson
Marshall Faulk
Tony Dorsett
Walter Payton
Fast, Strong, Athletic, Elusive, Agile, Quick, Tough, Walter had it all!