Knott made 46 saves on 55 shots en route to a 16-9 win for Team Canada over Team Haudenosaunee in the finals.
The 19-year-old made an assist in the championship game that led to a shorthanded goal by teammate Silas Richmond.
Knott was named All-World First Team for all goalkeepers. He is eligible for the 2022 National Lacrosse League draft.
Former Laker and Brooklin Lacrosse Club assistant coach Gavin Prout was Canada’s head coach.