Dr. Joshua Metzl performed the surgery. Miller made the decision to have the surgery after consulting with the Broncos' medical staff in recent days -- Metzl is one of the team physicians -- as well as others, including noted foot/ankle specialist Dr. Robert Anderson.
"He had surgery [Friday] morning and I was told it went well, and we'll see how it goes," Broncos coach Vic Fangio said. "They haven't said anything on a timetable based on his surgery. That will depend on the healing.''
Many with the team think Miller's recovery time will be four to six months and that a best-case scenario would be three months.
Fangio said this week that Miller would go on injured reserve at some point in the coming days and would be "out for a while,'' but Fangio hasn't yet said Miller would miss the season.
When asked Wednesday whether Miller would miss the season, Fangio said: "There's a chance of that. It's too early to say for sure, [but] he's definitely out for a while.''
Because of roster uncertainty that has come with a shortened preseason and no offseason work due to COVID-19, teams can bring an unlimited number of players off injured reserve during the 2020 season if those players are medically cleared to play.
Miller suffered a dislocated peroneal tendon in his ankle -- the tendon rolled over the outside of the lower leg bone at the ankle -- during Tuesday's practice. Those who have surgery to repair the tendon often begin their recovery with no weight-bearing on the repaired foot/ankle for four to six weeks, followed by limited weight-bearing on the joint for another two to four weeks.
Miller, an eight-time Pro Bowl selection, had missed just one game -- Dec. 1 last year against the Los Angeles Chargers -- over the past six seasons.
Asked earlier this week to describe how the injury happened, Fangio said: "It was just a normal play. He rushed around the edge, he never hit the ground, never looked bad. If you saw the video, you'd think nothing happened, but it did.''