The Denver Broncos are installing a new offense under returning coordinator Bill Musgrave.

Musgrave took over with a half-dozen games remaining last season when the team fired Mike McCoy amid a six-game losing streak.

The offense is expected to be led by Case Keenum, who was signed in free agency.

"It's really a system that we built as a staff this offseason," Musgrave said. "We had wholesale changes on the offensive staff. We have our framework that I'm comfortable with and that I can teach and call in a timely manner. And then our staff has put together what we feel is a great system for our players, especially our QBs."