gorzo can spot start, as can Wang if either or both are still on the roster. that stretch runs right up to the non-waiver trade deadline. It would not surprise me if there is a pitcher currently not on the roster coming here. If Storen and H-Rod remain on schedule, there is going to have to be more staff shuffling too.
I've been saying since before the season that when there are 12 or so games in 12 days, there should be spot starts to give the starters coming off injuries (Stras, CMW) and that have not gone 200 IP before (JZ) an extra day's rest. This looks like a stretch to do it.
Note also that after 7/30, there is a stretch of 17 games in 16 days. So that is 35 games in 36 days. Even if we don't want to get the whole staff on a 5 day rest cycle, we will need 2 spot starts for the 2 doubleheaders in that stretch. It probably makes sense to throw in one or two more spot starts rather than go 7 times through the rotation without an extra days rest.