The San Diego Chargers have confirmed Keenan Allen tore the ACL in his right knee in Week 1 and will miss the rest of the 2016 season.
Allen had six catches for 63 yards before the injury.
Allen was limited to eight games in 2015 due to a lacerated kidney. Allen was on pace for over 1,400 yards before the 2015 injury.
The Chargers signed Allen to a four-year, $45 million extension this offseason.