Unless Ober gets a "reset" stint on the IL, I think Ryan moves into the playoff rotation, Ober has looked more than shaky lately and Ryan looked good on Saturday.
I have not projected starts to the end of the season so I don't know who might wind up where, but if the team can clinch early enough, they can start aligning the rotation. Right now 1-5 looks like Maeda, Lopez, Gray, Ryan, and Ober. Unless Maeda is #5 right now, then he is going to have start being moved up to #3.