Notre Dame football and its fan base is in mourning today following news of the passing of former Irish defensive tackle Louis Nix.

Nix’s death was confirmed on Saturday night by his mother. The Jacksonville, Fla. native, whose family had declared him missing last week, was only 29 years old.

Nix was a star for the Fighting Irish from 2011-13, and was one of the anchors of the 2012 team, which went 12-0 in the regular season and reached the BCS National Championship Game.