Zach Harrison: Everything you need to know

Harrison (knee) won't return this season, D. Orlando Ledbetter of The Atlanta Journal-Constitution reports. Harrison was placed on the injured reserve list in late November due to a knee issue likely sustained in the Week 7 loss to the 49ers. He played in just seven games this season, recording 22 total tackles, including 4.5 sacks, two forced fumbles and one pass defensed. LaCale London will likely remain one of the Falcons' top defensive ends while Harrison is sidelined for the remainder of the season.

The Falcons placed Harrison (knee) on IR on Saturday, Tori McElhaney of the team's official site reports. Harrison first hurt his knee in mid-October. He missed two games before returning to action in Week 10 against Indianapolis. However, Harrison sat again during Week 11 and had already been deemed out for this Sunday before being moved to IR. Atlanta coach Raheem Morris said Saturday that Harrison had a setback with his knee and will need to get the issue "fixed," which may mean the third-year pro is going to need surgery.

Harrison (knee) has been ruled out ahead of Sunday's matchup against the Saints, Tori McElhaney of the Falcons' official site reports. The Ohio State product didn't practice Wednesday or Thursday and will now be sidelined for the fourth time in the Falcons' last five games on Sunday. Harrison has appeared in seven games this season, recording 22 total tackles, including 4.5 sacks, and one pass defensed. Expect Brandon Dorlus to have an expanded role on Atlanta's defense while Harrison remains sidelined in Week 12.