 However, he would be called up to the team late in the season as part of an initiative by the team to give AHL rookies some late season experience.Brown made his NHL debut on March 17, 2016, against the Florida Panthers, and scored his first NHL goal on March 24 against future teammate Frederik Andersen of the Anaheim Ducks.Brown made the Maple Leafs full-time for the 2016–17 season.