Amateur Desharnais played college hockey with
Providence College from 2015 to 2019, after playing a season for the
Chilliwack Chiefs of the
British Columbia Hockey League (BCHL). In his last year of colligate hockey he won the Hockey East Best Defensive Defenseman of the Year award.
Professional After playing three seasons of minor pro with the
Wichita Thunder of the
ECHL and the
Bakersfield Condors of the
American Hockey League (AHL), Desharnais was signed in March 2022 by the Oilers to a two-year, entry-level contract. During the
2022–23 season, Desharnais was recalled by the Oilers and played his first NHL game on January 11, 2023, a 6–2 victory against the
Anaheim Ducks. Desharnais scored his first career NHL goal on October 29, 2023, in an outdoor game against the
Calgary Flames where the Oilers won 5–2. During his time with the Oilers, Desharnais played in the
2022 and
2023 Stanley Cup playoffs. On July 1, 2024, Desharnais signed a two-year, $4 million contract with the
Vancouver Canucks as an
unrestricted free agent. During the 2024-25 season he posted 3 assists and 34 penalty minutes in 34 games. On January 31, 2025, Desharnais was traded to the
Pittsburgh Penguins along with a conditional
2025 first-round pick, forward
Danton Heinen and right wing prospect
Melvin Fernström in exchange for defenceman
Marcus Pettersson and forward
Drew O'Connor. Desharnais appeared in ten games with the Penguins and earned a +4 rating and four penalty minutes. ==Personal life==