In the postseason, Dahlen helped lead Timra to the Allsvenskan Championship, scoring 22 points (10 goals, 12 assists) in 15 games and was named Playoff MVP, and led the league in postseason goals, assists and points. By winning the championship, Timra was promoted to the Swedish Hockey League (SHL), Sweden's highest tier of hockey in the country.
By the end of his Allsvenskan career with Timra, he registered 265 points (124 goals, 141 assists) in 241 games and added 54 points (30 goals, 24 assists) in 35 postseason contests. Among several awards and accolades, Dahlen was named Best Junior in 2016-17, and Forward of the Year three times (2017-18, 2019-20, 2020-21) and MVP three times (2017-18, 2019-20, 2020-21).
Dahlen has also appeared in the American Hockey League (AHL) for the Utica Comets and
San Jose Barracuda
. He joined the Barracuda in the 2018-19 season and appeared in seven games, recording four assists. In his AHL career, he has registered 35 points (15 goals, 20 assists) in 59 games.
Internationally, he has also represented his native Sweden on the WJC-18 team in 2015 and the 2017 World Junior Championships, where he posted six points (five goals, one assist) in seven games.
The five-foot-eleven, 180-pound native of Ostersund, Sweden was originally selected by Ottawa in the 2016 NHL Draft (2nd round, 42nd overall) and later acquired by San Jose from Vancouver on Feb. 25, 2019. Dahlen is the son of former Shark Ulf Dahlen.