Until teams decide to switch them. Like this very team has done whenever it's suited them.
Like they did with Charles Haley, Demarcus Ware, Anthony Spencer, Benson Mayowa, Randy Gregory, and whoever else they had at the time they wanted to.
But when they don't? No, then it "can't be done!"
Then they're a "OLB only!!!!!"
Schemes vary mightily.
This Cowboys team uses a strong front 4 to control the run with an expectation all 4 guys can handle their assigned lanes.
This isn't the 3-4. Or some weird wide 9 defense.
Watt could have likely eventually grown into a solid RDE here. But he was on 8000 calorie a day diet already to play 3-4 OLB in Pitt.
Goofballs ignore we had a similar guy in Randy Gregory and it took him 3 years to get starter snaps and he was a much better pure pass rusher coming out of college.
He played only 45% of the snaps last year as a starting RDE 4 years after he was drafted, 23% as a rookie.
Benson Mawoya played 33% of the snaps here. He was a cheap role player.
DAL wasn't using an R1 pick on a guy to play 35% of the snaps as Watt would by DESIGN.
They want DLaw and TyCrawford 66% of the snaps with R1 picks.
Rod knows this defense, fans mostly know nothing.