IMO signing Haynes was a bad move. By signing Haynes, either Reitsma or Chen, who are better, must go to the bullpen to make room for the lesser, more expensive veteran. I don't know if it makes much sense to take your best starter from last season(Reitsma) and make him a middle reliever.
But I guess Haynes is here to stay, so here is my rotation:
Harnisch will have to earn his spot. I'm a big fan of his, but the rotation is overcrowded as it is.
Gabe and Sully stay because they Reds won't unload their contracts.
I would rather keep Merker than Rijo. Sorry Jose, you gotta earn your spot. If Merker can get LH hitters out, he stays if there is room. I don't know if there will be. Does Chen have options?