Depends I guess on how the team goes.
Over the first three games our D has been rock solid, but our offense has really struggled. That could just be due to early season jitters (chemistry, conditioning, etc) or it could be because we simply don't have enough scorers. We'll find out which of those is true once we get up in the 7 or 8 games played range I would say.
If we get to that point and we are STILL struggling to put points on the board, then I would very seriously consider giving a few minutes (even if its just 6-8 mins a night) to Rozier and seeing how he goes.
Rozier likely has the highest upside as a scorer of anybody on this team (not named Isaiah Thomas) and with his aggressiveness, swagger and athleticism he is the type of guy who could potentially be a great "instant offense" guy. In preseason he was on of our most effective (and efficient) scorers when given the playing time, and didn't seem to have any problems getting his shot off against NBA defenders - even if it was only against the likes of Philly/Brooklyn/NY, that's still enough to convince me he's worth a shot.
RJ Hunter I think is a tougher one to justify. He's struggled a bit with his offense so far, and it might take him some time to get his shot flowing in the NBA - this seems to be a pretty common thing for shooters coming out of College (e.g. Reddick, Stauskas, McDermott). So far his greatest contribution has been with his defense and his playmaking, but those aren't really the things we're struggling with right now.
I'd also seriously consider giving Mickey some spot minutes from time to time. So far teams have been killing us on the boards, and we have struggled against teams that have a strong inside presence (e.g. Spurs and Sixers both gave us a hard time in the paint). It kinda feels like our interior defense really struggles when Amir Johnson isn't on the court, and I'd like to see what Mickey can provide in terms of his rim protection, rebounding, and potentially even some P&R offense.
If we continue to struggle in these areas, I wouldn't mind moving Amir Johnson into the starting lineup with Zeller or Sully (I think both combos would work well) and then trying Mickey + Olynyk on the second unit (which I also think would work well).
I feel Mickey (rebounding, shot-blocking) and Rozier (explosive speed and aggressive scoring) have some NBA-level skills right now that we as a team could use, so I wouldn't mind seeing both of those guys get a bit of action.