Is Jackson Carman "Your" Starting LG

[tms]

He is not. He had a chance to seize his role in the offense last year- at basically whatever position he wanted to play, save for LT- and he was relegated to Teams. We were forced to use injured players and back-end rotation guys as stopgaps on one of the most porous lines in the league, and he still couldn't find a way to contribute. At a time of great need when we literally had a Super Bowl in our sights, he seemed quite happy to hold himself to jumbo packages and field goals.

There could be other reasons, but I side with Occam on this one: sometimes the simplest explanation is the most likely. He's just not the right guy.