In his fourth season with Skellefteå AIK, Berggren broke out offensively in the 2020–21 campaign, finishing sixth in SHL scoring with 45 points in 49 games and co-leading Skellefteå AIK. Berggren became only the 13th player in SHL history to compile over 40 points in a season at age 20 or younger, and the first since Elias Pettersson in 2018.
Detroit Red Wings
On 20 May 2021, Berggren signed a three-year entry-level contract with the Detroit Red Wings to start his National Hockey League career.[2] After participating in the Red Wings training camp ahead of the 2021–22 season, Berggren was assigned to their American Hockey League (AHL) affiliate, the Grand Rapids Griffins, to start the season.[3] While with the Griffins for the entirety of the season, Berggren set a new franchise record for most points recorded by a rookie in his first season. He originally set the record on 24 April 2022, with an assist in a game against the Chicago Wolves.[4] Berggren was later recognized as the AHL's Rookie of the Month for April after totalling six goals and 14 assists through 14 games.[5] Berggren finished the season setting franchise rookie records with 43 assists, 64 points, seven game-winning goals, and three overtime goals.[6] In spite of his personal achievements, the Griffins failed to qualify for the Calder Cup playoffs for the first time in seven years.[7]
Berggren participated in the Red Wings training camp ahead of the 2022–23 season but was re-assigned to the Griffins on 9 October.[8] He recorded four goals and three assists for seven points through seven games before being recalled to the NHL level on 10 November.[6] Berggren made his NHL debut the following night against the New York Rangers, where he recorded his first NHL assist.[9] After recording another positive effort in the next game against the Los Angeles Kings, Berggren was promoted to the Red Wings first line. Once Tyler Bertuzzi returned from injury, Berggren was bumped down to the third line with Joe Veleno and David Perron.[10] On 15 November, Berggren recorded his first career NHL goal against the Anaheim Ducks.[11] Through his first 23 NHL games, Berggren quickly tallied five goals and eight assists for 13 points.[12] Berggen finished the season in the top 10 among NHL rookies in goals with 15 while ranked 14th with 28 points. He also recorded the highest shooting percentage of any Red Wings rookie since Henrik Zetterberg in the 2002–03 season. Berggen was subsequently named the 2023 Detroit Red Wings Rookie of the Year by the Detroit Sports Media Association.[13]
Following his rookie season, Berggen changed his jersey number from 52 to 48.[14] While he was re-assigned to the AHL to start the 2023–24 season, Berggen was called up under emergency conditions on 20 October. At the time of the recall, he had accumulated three assists through two games.[15]
On September 16, 2024, Berggren signed a one-year, $825,000 contract with the Red Wings.[16]
