The boring part of speculating is it could be for naught within the next few hours, so it hardly feels worth it. That said, it’s a low bar.
So, I will say that I’m not sure a hot start by workman so far this year is enough to justify a 40-man spot, and I think Scott Harris is “loathe” to give those up without good reason. We know that Clark is likely to occupy a 40-man spot in the near future anyway, and for a long time to come. If you add workman now, that requires a move. If you add Clark in six weeks, that requires another move. I’m not sure giving a 40-man spot to workman for what might be a short term need is worth it.
As for Clark being “ready,” I’m not going to put too much weight into GM speak. Even if they would prefer waiting, things changed last night. They can always send him back down when other options become available (and/or if he is struggling). He can play CF and bat 9th and we can see what happens.