Broncos fans surely know Case Keenum, Denver's new starting quarterback. But are you familiar with his position coach, Mike Sullivan? The 15-year NFL veteran spends more time with Keenum than any other Broncos coach, and he may be best suited to offer insight about Keenum as a person and player. But there's more to know about Sullivan, who played football at the United States Military Academy, served as an Army Officer and has spent 23 years in coaching. We caught up with Sullivan about Keenum, his previous role as an offensive coordinator and how his military background remains an integral part of his personality.

Aric DiLalla: After spending time with Case throughout the offseason and the first few weeks of the regular season, what's impressed you most about him so far?

Mike Sullivan: "His work ethic, his willingness to do whatever it takes to improve, his competitiveness, his resilience. He's just a joy to be around. The guy is really just working very hard. He's competitive, and he just keeps getting better and better. It's his first year in the system and kind of learning how we operate, being with new teammates and coaches. I'm just really pleased with the effort he's put in and what lies ahead for him."

AD: We've seen what he's like on the field, but what's he like in the meeting room as a leader and a student of the game?

MS: "Well, he's a leader not just in that room, but I think in the offensive meeting room and even with his defensive teammates. Any leader has to lead by example, and he certainly does that in terms of his admissions earlier, his work ethic, his preparedness and his performance on the field. But he also finds unique ways. He knows that not all of his teammates are the same. Some guys do better with positive reinforcement or encouragement, other guys may need to have things explained to them so that they understand so that it can be easier for them to get the job done. He does a very good job of trying to find different ways to motivate and teach and lead his teammates. He's got a great demeanor about him too. He's a hard worker, but he definitely has a sense of humor and will bust chops as much as anybody. He's just great to be around."

AD: Case said he needs to cut down on his turnovers. What gives you confidence that he'll be able to do not just that, but also take a step forward as the season progresses?