Lake Forest, IL -- (Sports Network) - Chicago Bears linebacker Pisa Tinoisamoa will miss the remainder of the season with a knee injury.

The strongside linebacker will undergo arthroscopic microfracture surgery to repair articulating cartilage damage in his right knee. The injury occurred in the first half of Sunday's loss at Atlanta.

Tinoisamoa made four tackles and forced a fumble on Sunday. He is the second Chicago linebacker to be lost for the season as Brian Urlacher sustained a dislocated right wrist in the season opener.

The six-year veteran made 135 tackles, including 88 solo and also notched three sacks in 2008 for the St. Louis Rams. He was reunited with Bears head coach Lovie Smith, who was Tinoisamoa's defensive coordinator in St. Louis during the 2003 campaign.