On April 19, 2014, the Dallas Stars of the National Hockey League signed Desrosiers to three-year entry-level contract,[1] but he was returned to the Rimouski Océanic for the 2014–15 QMJHL season where, in his final year of major junior hockey, he was recognized for his outstanding play when he posted the QMJHL Best GAA of 2.50 to win the Jacques Plante Memorial Trophy and was selected as the 2014–15 CHL Goaltender of the Year.
After four seasons within the Stars organization, Desrosiers was not tendered a qualifying offer and was released as a free agent on June 25, 2019.
[3] In the following pandemic delayed 2020–21 season, Desrosiers spent the entirety of the year on the Panthers extended taxi squad, without featuring in a game.
As a free agent from the Panthers, Desrosiers opted to continue his career in the AHL by agreeing to a one-year contract with the Manitoba Moose, the primary affiliate to the Winnipeg Jets, on August 17, 2021.
[5] Having concluded his contract with the Jets, Desrosiers continued his career in the AHL by signing a one-year deal with the Laval Rocket, affiliate to the Montreal Canadiens, on July 17, 2022.