How's my line up please help me set the flex spot?

10 team I am projected to win by 50 points but I am still concerned :) QB - Luck RB - Spiller RB - Fred Jackson RB/WR - ???? WR - DeSean Jackson WR - T WIllaims TE - Graham D - NYG K - Bailey Bench RB - Charles (bye) Shonn Greene, J Stewart WR - K Wright, H Douglas, H Nicks