I don't.
Green can show all the potential he wants, he's no Grant-type player. Jackson is the one who's going to lose his job to this kid. You don't want to risk it with Starks, who's history if injuries seems to be forgotten because of some decent running in the play-offs.
Grant is here to stay. At least for this year. See what he can do, if he's completely back, whether that injury has slowed him down or not. Starks will obviously see some more carries. Let's pray that he doesn't bust a knee or something.
And then Green won't see a lot of time, I reckon. We never incorporate our 3rd RB into our offense a whole lot, not like the Patriots do, for instance.
The only way I see him flash a bit or see Jackson make the roster, if is Grant will go on the PUP list, which would be a huge longshot, since his timetable for recovery would've most likely allowed him to have played some play-off games last year, had he not been on IR.