Updated

Englewood, CO (SportsNetwork.com) - The Denver Broncos have declared quarterback Peyton Manning as questionable for Monday night's game at Cincinnati due to a thigh injury the five-time league MVP sustained last week.

Manning, who was a limited practice participant during the week, is still fully expected to start Monday's contest, however. He was held out of one series of Sunday's 22-10 win at San Diego after taking a shot to his thigh while blocking Chargers linebacker Donald Butler on a running play but played the entire second half following a brief visit to the locker room.

The 38-year-old has never missed a start in 16 of his 17 NFL seasons, the lone exception being the 2011 campaign. Manning sat out that entire season, his last with the Indianapolis Colts, after undergoing spinal fusion surgery.

Wide receiver Emmanuel Sanders is also questionable for Denver's Week 16 tilt after sitting out Saturday's practice with an illness. Offensive tackle Ryan Clady (thigh) and running backs Ronnie Hillman (foot) and Juwan Thompson (foot) were deemed 50/50 as well, though all were limited practice participants throughout the week.

Wide receiver Demaryius Thomas, tight end Julius Thomas and running back C.J. Anderson, each of whom are dealing with minor ankle issues, are all probable to face the Bengals.

Linebacker Brandon Marshall, Denver's leading tackler, has been ruled out after spraining his left foot in the San Diego game.