[4] Prior to the 2011 NHL entry draft, Manson accepted a scholarship to play NCAA Division I ice hockey for Quinnipiac University for the 2012–13 season.

[4] Manson joined the Northeastern Huskies men's ice hockey team for their 2011–12 season, where he played in 22 games and recorded four points.

[12] On March 25, 2014, forgoing his final year of collegiate eligibility, Manson signed a two-year, entry-level contract with the Anaheim Ducks.

[13] He began the season with the Norfolk Admirals in the American Hockey League (AHL) before being recalled to the NHL level due to various injuries.

After Mark Fistric suffered an upper-body injury during a game against the St. Louis Blues he subsequently made his NHL debut on October 31, 2014, against the Dallas Stars.

[15] After attending the Ducks' training camp, Manson was named to their opening night roster prior to the 2015–16 season but was shortly thereafter placed on their injured reserve due to an unspecified upper-body injury.

[16] Following a game against the Toronto Maple Leafs on March 24, Manson was fined $2,487 for making an inappropriate throat-slashing gesture towards Nazem Kadri.

[24] In the following pandemic shortened 2020–21 season, on January 21, 2021, it was announced that Manson would be out nearly six weeks with an oblique muscle injury sustained against the Minnesota Wild.

While in the final season of his four-year contract and with the Ducks trending out of playoff contention, Manson was traded to the Colorado Avalanche, in exchange for Drew Helleson and a 2023 second-round draft pick on March 14, 2022.

[26] He made his debut with the Avalanche against the Los Angeles Kings, demonstrating his physical presence to register a game high 10 hits, in a 3–0 victory on March 15, 2022.