Welcome back, RotoBallers! The final four of the fantasy playoffs start for most fantasy leagues. Depending on if you facedPuka NacuaorKyren Williamson Thursday night, you may need upside to catch up and advance to the fantasy championship. We are here to help you set that winning lineup with our NFL team'sWeek 16 fantasy football FLEX PPR rankings.Kansas City Chiefs running backIsiah Pacheco(shoulder) returns to action against the Las Vegas Raiders after missing the last two weeks with a should...