L'Heureux (lower body) won't be available for the start of the 2026-27 campaign, per Aarif Deen of Colorado Hockey Now on Tuesday.
L'Heureux is currently on injured reserve, and it's unclear when he will be ready to return. He has been ruled out for at least Wednesday's matchup against the Kings. With Logan O'Connor (lower body) also unavailable, the Avalanche will dress 11 forwards and seven defensemen in their season opener.