Point being, and not trying to be argumentative, but someone within the Twins org identified Anibal Sanchez last spring, Twins signed him, but yet for some reason the Twins released him when someone better came along (Lance Lynn!) and Sanchez ended up in Atlanta.
tl;dr it's not as simple as it seems once you make the guy an offer, bring him into camp, etc. Though I am not opposed to signing one of those guys.
Exactly. The Twins made a mistake by pivoting away from the reclamation project and going with the "buy (relatively) high" route instead. Had they just stuck with Sanchez they'd have ended up with a nice asset on their hands. But I'm not totally sure why that anomaly of a situation has any bearing on what we're talking about here.
If, say, Chris Tillman comes into camp healthy, and Johnson or Hefner help him solve a few things, he could very well look like the best option for the fifth spot. This is a guy who had a 3.99 ERA in the AL East from 2014-16, and is only 30. So, in that event, you push Mejia and Romero to the bullpen and roll with him, or he fills the spot of someone else who gets hurt. I'm not seeing what's overly complex about this.