We know the savviness of McSnead and their obsession with detail so I think we can say that the rams have a contingency plan for blyth being signed by another team. If he really was a key priority, they wouldn't have let him stay on the market.
The rams have understood that blyth moving out of LA is a decent probability and they have been working on multiple options to make sure the biggest gamble of their careers (stafford) doesn't fail. If they don't feel strongly that his successor is already in the building, I don't see them fucking around with a camp battle between hopefuls. They will look to either make damn sure they get their Center in the draft even it means moving up from #57, or if their guy, or guys, are gone, then maybe they will trade that pick and a player to get a proven vet.
Unfortunately, we don't how many rookie centers they would actually feel confident in starting, but if they are gone by 57 I would be on the phones trading that pick plus a replaceable player to finally get us a proven long term center.
The fact that they passed on lindsey and hudson, 2 obvious upgrades, is concerning, at least for me because they don't include me on their zooms regarding the situation, and because I'm guessing that means they are comfortable going forward with either blyth, an unproven current player, or a rookie...not saying any of those can't work out, but I'd rather go with the proven elite player at the position.