David "The Demolishioner" Lemieux is a Canadian professional boxer who held the IBF middleweight title in 2015.

https://boxrec.com/en/proboxer/389447

Originally from Peterborough, Cody Crowley aka The Crippler is a Canadian boxer fighting as a welterweight out of Las Vegas these days.

https://www.premierboxingchampions.com/cody-crowley

Custio Clayton, aka the War Machine, is a Canadian professional boxer who has held the WBA-NABA welterweight title since 2019. As an amateur he is a six-time Canadian national champion and represented Canada at the 2012 Olympics, where he reached the quarter-finals.

Erik Bazinyan and his family immigrated to Quebec in 2011 when he was 16 years old. Erik who was a member of the national team in Armenia in the 81 kg then the 75 kg intended to continue training upon arrival in Quebec, determined to achieve the goal he set for himself as soon as he set foot for the first time at the gym; to become world champion as a professional boxer. At the end of a most rewarding amateur career, where he built an impressive record of 109 wins in 110 fights in addition to gaining important international recognition, Erik decided to make the jump in the major leagues as soon as he reaches the age of 18, in 2013.

https://www.eottm.com/athletes/erik-bazinyan/