Head coach Sean Payton announced Tuesday that it was an ACL injury that landed Gargiulo on injured reserve, Aric DiLalla of the Broncos' official site reports.
Gargiulo was carted off the field during Saturday's preseason game against the Cardinals with what's now being described as an ACL injury. He was competing for a spot as a backup guard on the team and will now shift his focus to getting healthy for next season.