Personally I don't see both Wendell and Connelly being extended, and Connelly will be in the final deal of his pact at a somewhat higher cap hit.
He's got back issues, is coming off of a somewhat recent shoulder surgery, and hasn't been able to take part in any activity to this point. He's obviously safe for this year, but he's hardly safe for next year too--especially considering that a decision will have to be made with Wendell.
For what it's worth, Connelly was obviously the weakest link on the offensive line last year too. Let's not act like he's a wall that enables Tom Brady to continue his career. Stating that "we'll get Brady killed" if we cut Connelly next year is borderline ridiculous in my opinion.
If anything, a high round offensive lineman pick is forseeable in our future for 2014. On top of that, McDonald may very well be on the shadow roster with a nod/wink deal to return once fully healthy; not that I think it makes that much of a difference either way. Marcus Cannon could play RG too, couldn't he? And for a much cheaper cost. One way or another we're going to reload with a higher to mid round draft pick on the O-line very soon.
Dan Connelly's 3 million dollar cap hit definitely makes him one of the potential replacement players for 2014.