Brandon Staley is Defensive Coordinator

There are plenty DE/DTs in the league at 6'7" and taller. I want him to slim down a little and attack, not play NT.

Calais Campbell is 6'8", bombed the combine and didn't even have a great final college season. He's made a decent career for being an out of shape weak big/tall man.
There's maybe 3 or 4 in the entire league. None of which 340+ lbs.

If you actually watch Walker play his tape this past year was just downright awful. He was consistently dominated off the LOS in a way no 340lb player should be.

You could place him at edge but that would require him to drop a significant amount of weight and he just doesn't have any actual pass rush moves nor the motor to play it well IMO.

Guys like Calais always had a motor. Walkers motor is very sub par. He often givens half effort on plays. Just too many red flags.