Truthfully, I didn't pay much attention to Spring Training as in previous years.
Let's say Matusz does poorly in his next 1-2 starts and Wada is ready to come back from the DL. Does he replace Matusz in the rotation and does Brian go to Norfolk?
Tillman had a poor first start at Norfolk, but if he gets going, he will be an option as well.
Britton is throwing again, and still thinks a mid-May / early June return is his expected arrival date.
Wada is going to be up at some point. (I could also see him joining the bullpen, maybe with the O's cutting Gregg.)
There will be the depth at some point, where the current starters will have to continue to perform to keep their spots.