Assessing your personal depth chart isn't just something you do after the first month of the season. This process must continue throughout the year, especially as we move toward the end of the fantasy regular season.
David Johnson's injury woes have opened the door for both Chase Edmonds and Kenyan Drake to step in and post strong fantasy performances. While Edmonds is currently out of action, Drake remains in the mix, while Johnson is attempting to play through the pain. There's no way to put Johnson anywhere close to the RB1 tier.
Meanwhile, Melvin Gordon's struggles seem to be a thing of the past after scoring 46.