What happened: The change came at 13:31 of the opening period. The game was tied 1-1 after 20 minutes in Boston. Jacob Gaucher tied it with 1:54 left in the first on an assist from Jett Luchanko.

Why it matters: Vladar signed a five-year, $27.5 million deal July 1 to anchor the crease. Preseason work in Boston shapes the depth order entering the 2025-26 season.

What to watch: Watch Kolosov's workload the rest of the night. Watch for any team update on Vladar before the next preseason skate.