We just saw 2017 Offensive Player of the Year Todd Gurley released by the LA Rams, and former Chargers star running back Melvin Gordon found a new home in Denver. Behind that shakeup is growing evidence that the role of running backs in the NFL is changing. A renewed focus on pass-heavy offenses, among other factors, is shifting the weight given to the position. FiveThirtyEight's Josh Hermsmeyer outlines the current landscape for running backs, from all angles.