I'm pretty sure that Romero has already used 2018 as an option year, meaning there's no downside, option-wise, to sending him up and down on the shuttle. So, rather than faking a DL stint, which is pretty shady, they can send him to whichever minors team is out of the running and have him rest a bit before coming back up. Maybe make two-inning start or two to stay sharp. Also, I'd be interested to see something like a piggyback situation if they want to limit innings or pitches but don't want to go to a six-man rotation. Could we bring up Slegers and have him pitch a "normal" game after Romero has gone through the lineup once? Mejia could work too, and he's already got a history of short outings in the majors, so a piggyback situation could be a win-win there. Given the bullpen struggles of late, it could be a win-win-win. In any case, based on what happened to Romero in the minors last year, I think fatigue is most likely coming, and it's possible that he hits a wall at some point like he did last year. If he does, you shut him down. Before that would happen, if at all possible, I think you give him minor league rest time or limit his use via piggybacking to avoid him hitting a wall at all, at least before rosters expand.