Ober is at 57.2 innings in the majors, but also has 17.2 in the minors, so his total is already at 75.1.
The team has 89 games remaining. If they were to follow a straight five-man rotation, that would set him up for 18 more starts. If he averages the 5.72 innings per start that he's had in the majors, he would have another 103 innings, which tracks to 178 for the year. That would be more than 75 percent more than his highest season and close to 2.5 times what he threw last year. And hopefully a few more in the playoffs.
I don't see that happening/being allowed to happen.
At the very least, I see them using a sixth man in some variation a few times. Even if they did that three times, they would save 15-18 innings from Ober's arm.
We'll get a first glance of their plans in the coming weeks. Assuming Ober-Gray-Ryan through the Boston series, there are 15 games left before the All-Star Game. Rocco said last night that Maeda will pitch "in the majors" this week.
Assuming no injuries, they've got three (or four) logical options with those 15 games.
Use Maeda from the pen. Yesterday, Rocco didn't say Maeda would get a "start," but that's how they've been using him. I don't see that changing, at least immediately.
Go to a six-man rotation for a couple weeks. No matter where Maeda slots in against Detroit, that gives them three starts each for Maeda, Varland and Lopez and two each for Ober, Gray and Ryan in the 15 games from Friday to the break. With a couple of off days, everyone would be making their last two starts on six days rest.
Given that Varland has struggled the last several times out, they could have Maeda take his spot, drop him back to St. Paul (or the bullpen) and have three starts each from Maeda, Lopez, Ober, Gray and Ryan. Again, with the off days, most of the remaining starts would come on five days rest.
A variation on those would be give Maeda Friday, Varland Saturday and then send him down. With the exception of one game, each starter would be going on five days rest until the break. It would cost Ryan one start before the break.
Option 2 saves a start for Ober, but I think it weakens the rotation in that it also trades three starts of Varland for a start each of Ober, Gray and Ryan, who have arguably been their three best starters the last while. For that reason, I would go with Option 3 (or perhaps 4). Though it costs Ober a start now, they will have opportunities to skip a start for him after the break.
No matter which option they choose, they will get an extended break for Ober (and everyone) in three weeks, but what they do with Friday and Saturday of this week will give a clue on how they plan to handle Ober.