You're not listening. DEs don't have to be edge rushers if they're playing on early downs.
I haven't seen this kid yet so I'll reserve judgment but 6'1 280 should wind up at DT.
Chill. Did we not kick DEs Demetrius Jackson and Chad Thomas inside on passing downs? You have to stop the run on early downs and then get your best rushers on the field. Position designation is not relevant