[6] After attending the Ducks 2015 training camp, Megna was assigned to Anaheim's American Hockey League (AHL) affiliate, the San Diego Gulls, to begin the 2015–16 season.

[12] After six seasons within the Ducks organization, Megna left as an unrestricted free agent to sign a one-year, two-way $700,000 contract with the Vegas Golden Knights on July 1, 2019.

[13] Assigned to AHL affiliate, the Chicago Wolves, for the duration of the 2019–20 season, Megna added three goals and 10 points through 60 games from the blueline.

As a free agent, Megna was unable to attract an NHL contract, opting to continue in the AHL by signing a one-year deal with the San Jose Barracuda on November 2, 2020.

Megna remained a healthy scratch during the club's inaugural playoff appearance, travelling with the roster as a designated "black ace".

On December 7, 2023, Megna was assigned on a conditioning stint to AHL affiliate, the Coachella Valley Firebirds, and made two appearances before returning to the Kraken.

[24] As an unrestricted free agent from the Blackhawks, Megna was signed to a one-year, two-way contract with the Stanley Cup champions, the Florida Panthers, for the 2024–25 season on July 5, 2024.