McCarron suffered a torn ACL in Saturday's preseason game against the Dolphins and is out for the season, D. Orlando Ledbetter of The Atlanta Journal-Constitution reports.
McCarron suffered a non-contact injury during the game, and the team was pessimistic regarding the potential diagnosis afterward. An MRI on Sunday confirmed the bad news, and the veteran backup now will be sidelined until 2022. Undrafted rookie Feleipe Franks is the only healthy quarterback on the roster aside from Matt Ryan, so the team may be in the market for a more experienced backup.