In the 2018–19 season, while in the final year of his contract with the Senators, Pyatt regressed in posting just 2 assists in 37 games before he was placed on waivers on January 1, 2019. After clearing waivers, he was assigned to the AHL, however before he could report he was traded by the Senators, along with Mike McKenna and a 2019 sixth round pick, to the Vancouver Canucks in exchange for Anders Nilsson and Darren Archibald on January 2, 2019. He was assigned to continue in the AHL with affiliate, the Utica Comets. Adding a veteran presence with the Comets, Pyatt contributed offensively with 6 goals and 19 points in 36 games.