Keenum reportedly received treatment on his knees after he brought Denver from behind to a 20-19 victory over the Oakland Raiders on Sunday, driving the Broncos to a game-winning field goal in the final seconds.
However, his sore knees are not expected to affect Keenum's availability for Sunday's game against the Baltimore Ravens.
With Keenum sidelined, first-year quarterback Chad Kelly ran the first-team offense in practice. The Broncos also have quarterback Kevin Hogan on the active roster.
The reports said Keenum is expected to practice on Thursday and Friday.
The 30-year-old Keenum, who signed with Denver as a free agent during the offseason, has completed 44 of 74 passes for 551 yards and three touchdowns with four interceptions while leading the Broncos to a 2-0 start to the regular season. He also rushed for a touchdown in the fourth quarter against the Raiders last week.
The 6-1, 215-pound Keenum signed with the Houston Texans as an undrafted free agent out of Houston in 2012, and played for the Texans, St. Louis/Los Angeles Rams and the Minnesota Vikings (last season) before signing a two-year, $36-million free-agent contract with Denver.