your odds are probably not great. however... what is your post season outlook? i would not necessarily give up yet. if you are PIT or NT bound, those games can help save your bacon.
i would do the math. most players need 22.5m on 25mpg. look at the games since his first complaint, ignoring foul out games where he played less than 22 or 25m (i'm not sure which). you could be as little as 0.1 under, and in that case, you'd be wanting to play the guy as much as possible to make it work.
if you are like a dozen games since his first promise and more than 1m under, there is probably nothing you can do, but i'd definitely do the math and make sure its out of reach before assuming. if you can't get to 22.5 since the first complaint, you are probably done. but even if you can get there since the 2nd i would probably try to make that happen. i've had 2 complaint guys return (without getting an all-clear), but promises have changed since then.