Oleksiak participated in the Ontario Hockey League with Saginaw and Niagara in 2011–12 after joining the Stars organization.
He participated in his first professional game in the 2012–13 season with Texas of the AHL, then on February 1, 2013, he made his NHL debut with Dallas against the Phoenix Coyotes.
Oleksiak assisted against the Calgary Flames on February 13, 2013, to earn his first NHL point. On October 28, 2014, he beat the St. Louis Blues and scored his first NHL goal.
Jamie Oleksiak Sister: Who is Jamie Oleksiak sister?
He has three sisters by the names of Penny, Claire, and Hayley Oleksiak.
Penny Oleksiak, a Canadian swimmer gained notoriety at the 2016 Summer Olympics when, with her victory in the 100 m freestyle gold medal event, she became the youngest Olympic champion in Canada and the first Canadian to win four medals in the same Summer Games.
Not much information is known about Claire Oleksiak since she is very private.
Hayley Oleksiak is an urban planner in Toronto.