He was recently the special assistant to the general manager and director of player development of the Las Vegas Wranglers of the ECHL, now currently an assistant hockey coach at Bishop Eustace Preparatory School, the coach of Revolution in the Revolution Ice gardens, and the owner of a franchise of Bain's Deli in Philadelphia.

Primeau held out after the club signed Igor Larionov and after playing for Canada in the 1996 World Cup of Hockey, Detroit traded him (along with Paul Coffey and a 1997 first-round draft pick, ultimately used to select Nikos Tselios) to the Hartford Whalers in exchange for Brendan Shanahan and Brian Glynn a few days following the start of the 1996–97 season.

In Game 6 of the Eastern Conference finals, against the Tampa Bay Lightning, Primeau scored the game-tying goal with 1:49 left in regulation.

Hockey legend Phil Esposito later told Primeau that, "During the '04 playoffs, when you and the Flyers took the Lightning to seven games, you were the most dominating player I ever saw.

[11] Primeau, along with his brother, Wayne, and Las Vegas Wranglers general manager Ryan Mougenel, own and operate the Durham Hockey Institute.

[12] Keith's son Cayden played his college hockey at Northeastern University, before signing his entry-level contract with the Montreal Canadiens after his sophomore season.