ENGLEWOOD, Colo. — The Broncos added three players to their 53-man roster Monday when they signed linebackers Keishawn Bierria and Corey Nelson and cornerback Davontae Harris.

Denver placed quarterback Drew Lock, tight end Jake Butt and running back Theo Riddick on injured reserve in corresponding roster moves.

The Broncos also added running back Khalfani Muhammad to their practice squad.

Bierria, who the Broncos drafted in the sixth round of the 2018 NFL Draft, played in all 16 games last season as a rookie.

Nelson returns to Denver after playing 53 games for the team from 2014-17. The linebacker's best season came in 2016, when he started six games for the Broncos and recorded 61 tackles and broke up five passes. He played one game for Atlanta in 2018.

Harris is a second-year player who the Bengals selected in the fifth round of the 2018 NFL Draft. He suffered an injury during the 2018 preseason and spent the first 12 games of the season on IR. Harris returned to the field in December and played special teams in three games for the Bengals.

The Broncos are now at their 53-man limit for the active roster.

Denver is able to designate two players to return from IR after eight weeks. Lock, Butt and Riddick are currently the only players eligible to return, as they were placed on IR after the initial 53-man roster was formed. Players placed on IR before Saturday at 2 p.m. are unable to return this season.

The Broncos also announced jersey numbers for the new players on the roster:

QB Brandon Allen: No. 2

WR Diontae Spencer: No. 11

CB Duke Dawson Jr.: No. 20

CB Davontae Harris: No. 27

LB Corey Nelson: No. 56

G/C Corey Levin: No. 62

FB/TE Andrew Beck: No. 83

Several Broncos players also changed numbers:

RB Theo Riddick: No. 21

OL Tyler Jones: No. 63

DL Deyon Sizer: No. 91