Week 13 Fantasy Rankings: FLEX Unknown 01:18 Having difficulty deciding on tough fantasy start 'em, sit 'em decisions at the RB, WR, and TE positions? Our fantasy FLEX rankings have you covered for Week 13. Share this Share on FacebookTweet on TwitterPlus on Google+ Related Posts'The Matches You Live For': Greatest Rivals Djokovic, Nadal Square OffBachendri Pal Conferred with Padma Bhushan; Padma Shri for Gambhir, ChhetriISL: Late Drama as Kerala, ATK Share SpoilsFA Cup: Sanchez Haunts Arsenal as Man United Continue Unbeaten RunBig-hitting Petra Kvitova, Naomi Osaka Face Off for Australian Open TitleAFC Asian Cup: Double Upset as Korea, Australia Crash Out of Asian Cup