[3][4] Lundberg started his professional basketball career in the Danish Basketligaen playing for Falcon (2013–14), BMS Herlev Wolfpack (2014–15) and Horsens (2015–2017),[5] before moving to Spanish LEB Oro team Manresa.

However, he did not make his NBA debut until April 3 against the Oklahoma City Thunder due to visa issues that stemmed from the 2022 Russian invasion of Ukraine.

[15] On July 21, 2022, Lundberg signed a two-year deal with Virtus Bologna of the Italian Lega Basket Serie A (LBA) and the EuroLeague.

[16] On 29 September 2022, after having ousted Olimpia Milano in the semifinals, Virtus won its third Supercup, defeating 72–69 Banco di Sardegna Sassari and achieving a back-to-back, following the 2021 trophy.

In June, after having ousted 3–0 both Brindisi and Tortona, Virtus was defeated 4–3 by Olimpia Milan in the national finals, following a series which was widely regarded among the best in the latest years of Italian basketball.

[2] In November 2020, he led the team to two consecutive surprise victories against favorites Lithuania and the Czech Republic in the qualification round to the European championships.

He was a regular at the GAME Finals Streetball Tournament at the Town Hall Square each summer and watched from the stands, when his older brother Abdel Jaleel Lundberg competed in the Elite Division and the Slam Dunk Contest, winning it several times.