Welcome to Week 15 of fantasy football and the latest incarnation of the flex rankings, as we combine the best of the best at running back, wide receiver and tight end and seek to aid fantasy managers in their decisions. One of the things that amazes me about this season is how so much can change from week to week. Some of it is about injuries and suspensions, but new names come from seemingly nowhere sans notice, and fantasy managers need to adjust. Just look at Week 14: The top scorer was a wide receiver who was traded this season. Next up was a running back who had yet to reach 60 rushing yards in a game this season. Who will be the stars of Week 15? Let us flex!