I'd check 10 mins before the first wave of games. If he is still a game time decision then I'd go ahead and put in Keller. You can't risk Graham not playing and taking a 0 for his position.
QB- M. Ryan, T. Pryor
RB- A. Morris, L. Bell, A. Ellington, C. Ivory, M. James, D. Martin
WR- J. Nelson, A. Brown, J. Boykin, D. Heyward-Bey,
TE- J. Graham, C. Fleener