Hey, RotoBallers! Week 13 has arrived and kicks off with the Cowboys and Seahawks on Thursday. We have two weeks left in the fantasy football regular season, and this could be the last chance managers could secure a playoff spot. It's time to set those winning lineups, and we've got you covered to make those all-important starting FLEX decisions with ourWeek 13 fantasy football FLEX rankings.Filling the FLEX sport can be challenging in Week 13, with six teams on the bye. Fantasy managers must ...