[2] He found his footing when paired defensively with Ben Thomas and received more playing time beginning in December after an injury to captain Jaynen Rissling.

[7] Sanheim attended both the Flyers' rookie and general training camps in 2014, and appeared in one preseason game, before returning to Calgary for the 2014–15 WHL season.

[9] Although he led all defensemen with 39 points through the first 41 games of the season, Sanheim found additional success starting in January when he was paired with Jake Bean, another offensively-minded defenseman.

[10] Through the remainder of their respective junior hockey careers, Sanheim and Bean served as primary scorers, as well as penalty killers, for a team that often lacked elite forwards.

[11] In the postseason, Sanheim scored the game-winning, double-overtime goal for the Hitmen to advance them past the Medicine Hat Tigers and into the Eastern Conference Finals for the Ed Chynoweth Cup.

[16] Sanheim missed another stretch of games at the turn of the calendar year, during which time he was representing Canada at the 2016 World Junior Ice Hockey Championships.

[2] Sanheim's junior hockey career ended when the Red Deer Rebels swept the Hitmen in the first round of 2016 WHL playoffs.

[20] Sanheim returned to the Phantoms for the 2016–17 AHL season, where he and his defensive pair Samuel Morin worked with assistant coach Kerry Huffman in order to heighten the physical aspect of their game for an older, larger group of skaters.

[25] He was reassigned to Philadelphia's American Hockey League (AHL) affiliate, the Lehigh Valley Phantoms, on January 22, 2018, but was later recalled on March 9 due to an injury to Robert Hägg.

The loss of veteran presence in Matt Niskanen particularly affected many of the team's young defenders, as Alain Vigneault struggled to find a stable top pairing for Ivan Provorov.