LAKE FOREST, Ill. -- Chicago Bears defensive end Ego Ferguson has been suspended four games without pay for violating the NFL's policy on performance enhancing substances, the league announced.

Ferguson, who is currently on injured reserve, will begin serving his suspension immediately.

The club’s 2014 second-round draft choice out of LSU, Ferguson appeared in four games (one start) this year before the Bears shut him down for the season due to a knee injury. Ferguson recorded 27 tackles and two sacks last year in 16 games.

Ferguson is the third Bears player suspended this week, joining 2015 sixth-round pick offensive tackle Tayo Fabuluje and practice squad wide receiver Jalen Saunders.