Bergman played three seasons with the Sharks' American Hockey League (AHL) affiliate San Jose Barracuda.
In February, Swedish sports paper Sportbladet reported that Bergman intended to return to Frölunda at the end of the season.
[5][6] On February 22, 2019, Bergman was included in the trade of Matt Duchene by the Senators to the Columbus Blue Jackets in exchange for prospects Vitaly Abramov, Jonathan Davidsson and two conditional first-round picks in 2019 and 2020.
Unable to break through to the NHL, as an impending restricted free agent from the Rangers, Bergman opted to return to continue his career in Sweden, signing a two-year contract with his original club, Frölunda HC, on May 8, 2019.
On 21 April 2020, Bergman terminated the final year of his contract with Frölunda, opting to sign a two-year deal with Finnish club, Lahti Pelicans of the Liiga.