[2] After playing for Juve Caserta, Gaddefors signed with the Antibes Sharks in March 2018 to replace the injured Paul Rigot and Max Kouguere.

[4] He won the Swedish Basketball League MVP Award of the 2020–21 season.

[5] Gaddefors averaged 20.3 points, 9.8 rebounds, 2.6 assists and On September 13, 2021, he signed with CS Dinamo București of the Liga Națională.

[8] On January 12, 2024, the New Taipei CTBC DEA terminated the contract relationship with Gaddefors.

[10] On September 1, 2024, Gaddefors signed with Twarde Pierniki Toruń of the Polish Basketball League.