Tough decision? Not too much actually. Tate is the "pick of the week" for most people, so why not go with a man who has rushed for 100 yards in both games he's played? Green will be a great play for Week 3 too, but I'd feel safer with Tate (no worries about Foster stealing carries either).
10 team H2H league, standard scoring [NFL.com]
QB: A. Rogers
RB: MJD, S. Jax, J. Starks, D. Murray, M. Bush
WR: M. Wallace, B. Marshall, P. Harvin, M. Colston, L. Robinson
TE: O. Daniels, J. Gresham
K: Sebastian Janikowski