In July 2015, Kurucs agreed to a four-year deal with the Spanish powerhouse FC Barcelona. He then spent the 2015–16 season playing in the junior club of FC Barcelona. In 2016, after turning 18 years of age, Kurucs joined the reserve team of FC Barcelona, FC Barcelona B, of the LEB Oro, which is the second-tier level in the Spanish league system. Kurucs made his debut in the European-wide top-tier levelEuroLeague, on 24 March 2017, in a 67–54 home win against Crvena zvezda Belgrade. In his first EuroLeague game, he logged three minutes of playing time, and scored two points. On 13 July 2018, Kurucs parted ways with FC Barcelona, but the Catalan club reserved the player's rights in case he returned to play in Europe.
NBA draft rights
Kurucs entered his name into the 2017 NBA draft, being one of a record-high 182 underclassmen to do so that year. Despite being consistently considered a first round draft pick throughout most mock drafts, Kurucs ultimately withdrew his name from the draft, on 12 June 2017; the deadline date that international players had decide to whether or not to withdraw their names from the draft. Kurucs entered his name for the 2018 NBA draft on 21 April 2018 as one of 236 underclassed prospects willing to enter the draft.
Brooklyn Nets
On 21 June 2018, he was selected by the Brooklyn Nets in the second round. On 16 July 2018, Kurucs signed a multi-year contract with the Nets. Kurucs made his NBA debut on 17 October and scored three points in 103–100 season-opening loss to the Detroit Pistons. On 21 December, Kurucs scored a career-high 24 points in the Nets' 114–106 loss to the Indiana Pacers. On 23 December, Kurucs recorded his first career double-double with 16 points and 10 rebounds in a 111–103 won over the Phoenix Suns. On 26 December, he had 13 points and a career-high 12 rebounds in a 134–132 double overtime win over the Charlotte Hornets. On 7 January 2019, he repeated his career high 24 points in a 116–95 loss to the Boston Celtics. On 29 January, Kurucs was named a participant of the 2019 Rising Stars Challenge as a member of the World Team.
National team career
Kurucs played for the Latvian national under-16 team at the 2014 Baltic Sea Cup, and at the 2014 FIBA Europe Under-16 Championship. He played a crucial role in helping Latvia win the silver medal at the tournament, as he averaged 13.4 points, 5.9 rebounds, 1.9 assists, 1.4 steals, and 1.1 blocked shots per game, en route to earning a spot on the All-Tournament Team, and being selected to the Eurobasket.com's website All-European Championship Under-16 First Team.
