[3] While playing with the Minor Midget AAA Toronto Marlboros, Stephens helped lead the team to a Kraft Cup title and Scotiabank GTHL Playoffs championship during the 2012–13 season.

[5] His outstanding play with Saginaw was recognized when he was chosen to skate as a member of Canada Ontario at the 2014 World U-17 Hockey Challenge.

[7] In his final season with Saginaw in 2015–16, Stephens made 43 appearances, tallying 22 goals and 19 assists, while being named team MVP.

[14] On December 9, 2019, Stephens made his NHL debut in a 5–1 Lightning loss to the visiting New York Islanders at Amalie Arena.

[21] On July 30, 2021, Stephens was traded to the Detroit Red Wings in exchange for a sixth-round pick in the 2022 NHL Entry Draft.

[20] While attending the Red Wings training camp, Stephens earned praise from coach Jeff Blashill for his skating ability and energy while projecting he would play on their fourth line.

[23] He spent the entire 2022–23 season with Montreal's AHL affiliate, the Laval Rocket, scoring 20 goals and 41 points in 68 games.

[27] He made his Canadiens debut in a 5–4 overtime loss to the Detroit Red Wings on December 2 playing on the fourth line with Jesse Ylönen and Joel Armia.

[31] In April 2015, he captained the Canada men's national under-18 ice hockey team to a bronze medal as the 2015 IIHF World U18 Championships.