Maybe they are trying to trade Johnson and if you send him down no one is going to want him.
Yeah, that was one of the scenarios, but I figured they could do all that without bringing up Dominguez. I was also thinking they they wanted to showcase CJ at first for an eventual trade, but still, you wouldn't need Dominguez up to do that.
Another possibility I contemplated is that Schafer is really in the doghouse, either getting-sent-down-doghouse, traded-doghouse or just sort of benched-for-a-long-time-doghouse and they knew only Bogey could play center in that scenario, and felt Dominguez was somehow needed for third since CJ would be at first and they didn't want Downs or Bixler there. As you can guess, this is a convoluted theory with numerous holes, and doesn't make much sense.
I was also wondering if CJ can't play third due to his health, why not bring Wallace up and let him man third until CJ is healthy enough, at which point they would switch. That didn't happen.
Anyways, I'm rambling and nothing makes real sense. It is probably obvious and I am just too dense to see the obvious. Hope the kid gets some nice chances at third to showcase his glove, and have some good ABs to give everyone some hope.