Your starting rotation is as follows:
1. Wandy Rodriguez
2. Bud Norris
3. J.A. Happ
And two of Livan Hernandez, Zach Duke, Kyle Weiland, and Jordan Lyles. Lucas Harrell and Henry Sosa won't be in the rotation, but are competing for bullpen spots with the big club.
The tale of the tape (Spring Training 2012 edition):
Livan: 12.1IP, 16H/6ER, 5K:2BB, 2HR. 4.38 ERA/1.70 WHIP.
Duke: 11IP, 17H/8ER, 7K:4BB, 2HR. 6.55 ERA/1.91 WHIP.
Weiland: 11IP, 7H/2ER, 7K:5BB, 0HR. 1.64 ERA/1.09 WHIP.
Lyles: 6IP, 8H/4ER, 3K:2BB, 1HR. 6.00 ERA/1.67 WHIP.
We do know that Lyles threw in a minor-league game, so there are some stats that we're missing here. The clear leader - from these stats alone - is Kyle Weiland (yes, on the strength of one start). But the veteran statuses of Livan all but assures him a spot. With Myers shifting to the 9th inning, I'd be ecstatic to see Weiland and Lyles get those last two rotation spots. But I don't think that'll happen. What I could see happening is SP4 going to Livan, SP5 going to Weiland, and Lyles waits in OKC under the tutelage of Burt Hooton until something happens - be that injury or trade.