Carey flip-flopped with Greg Jerman, who moved from right guard to right tackle.
This wasn't a good sign for Jerman, who was working for the first team. His place there was taken by 2003 third-round pick Taylor Whitley.
Stay with us, there's more.
Coach Dave Wannstedt said he wanted to take a look at the guys at the new positions and added that if "something grabs my attention," then he'd make a switch, otherwise he'd go back to the way things were.
OK, this obviously raises several questions, the most obvious of which is: What does it all mean?
Well, the obvious answer is that the Dolphins aren't happy with the progress of the offensive line.
And anybody who watched the preseason opener or Monday's practice would understand why.
The move of Carey is significant because this is your first-round pick, and it's a guy the Dolphins very much would like to see in the starting lineup.
It apparently has been deemed that Carey will not beat out veteran free agent acquisition John St. Clair. On top of that, neither Jerman nor Whitley, who got work with the first-team offense at practice last week, have been overwhelming.
So the conclusion here is that Carey won't have to do much to become the starting right guard.
As far as the move of Yates and Hadnot, this might signal a disenchantment with Hadnot. He had drawn praise from Coach Dave Wannstedt, but didn't look good against Jacksonville.
He was working as the second-team center behind Seth McKinney, with really no one else behind. So we're thinking the Dolphins want to find another alternative.
Of course, this isn't exactly boding well for the offensive line. But maybe this new combination will provide better results.
And that's the bottom line for the offensive line.