I own Calvin in another league, I did not make the playoffs with that team but here is the way I calculated on whether or not to start Calvin.
If I thought Detroit would have to throw the entire game, I started him. If I thought it might be a game that ends up 20-17 or such, I sat him, it seemed to work out.
Detroit will have to throw a ton v.s. ARZ , you know that. With the RB situation, that only compounds things. Do not worry about last week much.
I think the upside with Ganther/Foster are about 15 pts, I think 15 is a given for Calvin in a PPR.
BTW, if you are in a standard league, I would go Ganther.
Start Calvin with confidence!
If you get time, I need some upsideviewtopic.php?f=19&t=465151