By Shawn Childs Fantasy Football players will need the waiver wire to find replacements to key players like Breece Hall and DK Metcalf. Over the last week, the running back position has been a roller coaster position ride for some fantasy managers. Kenyan Drake went from a hot community five days ago to a wasted fantasy investment once Gus Edwards was activated from the injured list this week. Jeff Wilson played well over four games (415 combined yards with two scores and six catches), but the trade for Christian McCaffrey this week pushes Wilson to fantasy benches. The coin flip at running ba…