Most kids ‘going with the flow,’ expert says Sania Dookie, a child and youth mental health therapist from Calgary, said most kids are likely to take the transition to no masks pretty well.

Simmons debuted his mask on Dec. 13, 1959. That was a prelude to the league’s first all-mask game — a matchup between Montreal (Plante) and Boston (Simmons) — on Jan. 16, 1960.