FWIW, if Chappy is called up before 6/16 and remains up, then he does not burn an option this year.
I'm beginning to think that a lot of moves might happen around the time of the series with the Marlins on 6/13-15. That would likely be beyond the Super 2 date, so House could be up. Then there's the righty DH/1B they could add. I suspect Young will be up before that.
Cavalli to the rotation could happen any time. He's gone 4, 5, and 5 his last 3 starts in AAA, so he's probably as stretched as they want him to be. At this point, I think he's in the minors mostly to manage innings. Figure he starts Tuesday 6/3 and Sunday 6/8, then it might make sense to go with a 6 man rotation as they have 16 games in 16 days starting 6/10.