He was injured at the very end of the Buffalo game. Of course, if a Bill was injured then all we would hear about is an unneeded injury caused by the Pats scoring meaningless touchdowns. Since it was the Bills that were trying to score a meaningless touchdown, no one cares.
Madden actually pointed out that Buffalo was risking injury by frantically running their offense with under a minute to play down forty. But he didn't pick up on Green's injury.