The AFC North side used their first-round Draft pick to acquire the linebacker earlier this year.
The head coach told the team's official website: "I think he's really progressed, not just on the field, as a player from that standpoint.
"He's a guy that has tremendous conditioning. I haven't worried about that. He's been getting more and more reps every week. A lot of that is just learning the defense and learning the techniques and getting better.
"He plays with real good leverage. That shows in his strength. He has some natural strength that he plays with that type of leverage. He's really improved. All parts of his game have really improved."
Mingo has made six tackles and two sacks so far this season.