What happened: Columbus sent Kirill Marchenko, Elvis Merzlikins and Miles Wood to Toronto for Matthew Knies, Emil Andrae, Steven Lorentz and a conditional draft pick. Marchenko agreed to an extension with Toronto after telling Columbus he would not extend there.

Why it matters: Toronto adds a prime-age scorer entering the last year of his deal while Columbus reshapes its top two lines around Knies. Merzlikins sits on long-term injured reserve with a shoulder issue, leaving Toronto to map its early goaltending plan.

What to watch: Toronto finalizes its opening roster with the new additions available. Columbus slots Knies into camp lines to set early combinations.