Klark Riethauser

Klark Riethauser
No. 10 – Élan Chalon
LeagueLNB Élite
Personal information
Born (2008-03-29) 29 March 2008
Geneva, Switzerland
Listed height6 ft 8 in (2.03 m)
Listed weight200 lb (91 kg)
Career information
Playing career2025–present
Career history
2025–presentÉlan Chalon
Career highlights
  • LNB Young Star Game (2026)

Klark-Luca Maxwell Riethauser (born 29 March 2008) is a Swiss professional basketball player for Élan Chalon of the LNB Élite.

Early life and youth career

Riethauser was born on 29 March 2008 in Geneva, Switzerland.[1] He tried a variety of sports growing up, though he focused on tennis for several years, even winning the Swiss under-10 national championship.[2] Riethauser switched to basketball at age 11, joining Veyrier Salève Basket Club.[2] He quickly excelled in the Swiss youth system.[2] In 2023, Riethauser joined the youth academy of French club Élan Chalon.[3] He starred on the U18 and U21 teams,[4] helping the former win an Espoirs Pro B national title.[5] On 11 April 2026, Riethauser scored a career-high 37 points in a U21 Espoirs Élite game against Boulazac Basket Dordogne.[6][7] He was named to the 2025–26 Espoirs Élite All-Star Five after averaging 18.6 points and seven rebounds in 26 games played.[8][9]

Riethauser was invited to the 2025 Basketball Without Borders (BWB) Europe camp in Manchester, but did not attend due to injury.[3] The following year, he participated in the 2026 BWB Global camp in Los Angeles during NBA All-Star Weekend, and took college recruiting visits to Nebraska, Texas, and USC.[10][11] That summer, Riethauser earned all-tournament honors at the 2025–26 EuroLeague NextGen Belgrade Qualifier after averaging 16.3 points and 5.5 rebounds per game for Next Gen Team Belgrade.[12][13]

Professional career

Riethauser was first called up to the Élan Chalon senior team during the 2025–26 preseason, debuting in an exhibition match against the Lions de Genève in August 2025.[3] He made his competitive debut in the LNB Élite the following month, coming off the bench during the final seconds of a loss to Paris Basketball on 26 October.[14] Riethauser appeared in two additional league games that season, albeit in limited minutes.[15] He also made one appearance in the French Cup, scoring six points in a win over Tours Métropole Basket in the round of 16.[16] Riethauser was named to the 2026 LNB Young Star Game,[17] where he scored 10 points and grabbed seven rebounds.[18] He also finished as the runner-up in the three-point contest held at halftime.[19]

Despite interest from larger European clubs and National Collegiate Athletic Association (NCAA) programs like BYU, it was announced on 2 June 2026 that Riethauser had signed his first professional contract with Élan Chalon.[5][20]

National team career

Riethauser represented Switzerland at the 2023 FIBA U16 European Championship Division B. He played a limited role, averaging one point and three rebounds per game.[21] Two years later, Riethauser represented Switzerland at the 2025 FIBA Under-19 Basketball World Cup. He averaged 3.5 points and 3.3 rebounds per game, helping Switzerland to an eighth-place finish on home soil.[22] Later that summer, Riethauser played again at the 2025 FIBA U18 EuroBasket Division B. He averaged 21.7 points, 7.4 rebounds, and 2.7 assists per game.[23]

Personal life

A native of Geneva, Riethauser speaks French as his first language.[10] His father, also from Geneva, played professional basketball in Switzerland, while his mother is a native of Cameroon.[2]

References

  1. ↑ "Jouer - Klark Riethauser" (in French). LNB Élite. Retrieved 24 June 2026.
  2. 1 2 3 4 Surdez, Grégoire (3 March 2026). "Ce Romand est appelé à devenir la prochaine star de la NBA". 24 heures (in French). Retrieved 24 June 2026.
  3. 1 2 3 Cachod, Romuald (10 September 2025). "Un jeune Romand intègre l'équipe qui catapulte les Suisses en NBA". Watson (in French). Retrieved 24 June 2026.
  4. ↑ Lacoste, Alexandre (7 February 2026). "Trois ans après Kyshawn George, l'Élan Chalon va-t-il encore perdre son meilleur prospect suisse pour la NCAA ?". BeBasket (in French). Retrieved 24 June 2026.
  5. 1 2 Puybertier, Arthur (2 June 2026). "L'Élan Chalon conserve sa promesse : Klark Riethauser signe pro et snobe la NCAA". BeBasket (in French). Retrieved 24 June 2026.
  6. ↑ Pantel-Jouve, Gabriel (15 April 2026). "Klark Riethauser en feu : 37 points et une montée en puissance qui attire la NCAA". BeBasket (in French). Retrieved 24 June 2026.
  7. ↑ "Espoirs – Boulazac 74-92 Elan Chalon" (in French). Élan Chalon. 11 April 2026. Retrieved 24 June 2026.
  8. ↑ Guillot, Benjamin (29 May 2026). "Le cinq majeur Espoirs Élite de la saison 2025‑2026 : cinq noms à retenir pour demain". BeBasket (in French). Retrieved 24 June 2026.
  9. ↑ "Klark Riethauser dans le 5 Majeur Espoirs Élite 2025-2026 !" (in French). Élan Chalon. 4 June 2026. Retrieved 24 June 2026.
  10. 1 2 Hollinger, John (17 February 2026). "How tanking impacts NBA playoffs; plus the Swiss prospect who loves 'White Chocolate'". The Athletic. Retrieved 24 June 2026.
  11. ↑ "Top international prospects to participate in 10th annual Basketball Without Borders All-Star Camp". NBA.com. 9 February 2026. Retrieved 24 June 2026.
  12. ↑ "Klark Riethauser a brillé à l'ANGT de Belgrade !" (in French). Élan Chalon. 23 March 2026. Retrieved 24 June 2026.
  13. ↑ Cachod, Romuald (24 March 2026). "Un jeune basketteur romand flambe en Coupe d'Europe". Watson (in French). Retrieved 24 June 2026.
  14. ↑ Collin, Xavier (26 October 2025). "Basket-ball, Elite : mené tout du long, l'Elan Chalon corrigé par Paris". Le Journal de Saône-et-Loire (in French). Retrieved 24 June 2026.
  15. ↑ "Jouer - Klark Riethauser - Stats de carrière" (in French). LNB Élite. Retrieved 24 June 2026.
  16. ↑ "Klark Riethauser - Game-By-Game Stats - Season 2025-2026 - Coupe de France Masculine". Be-Basketball. Retrieved 24 June 2026.
  17. ↑ Collin, Xavier (3 March 2026). "Klark Riethauser, le nouveau prospect NBA suisse de l'Élan Chalon". Le Journal de Saône-et-Loire (in French). Retrieved 24 June 2026. (subscription required)
  18. ↑ "Klark Riethauser se montre au Young Star Game" (in French). Swiss Basketball. 5 March 2026. Retrieved 24 June 2026.
  19. ↑ "BASKET : Young Star gagnants pour Yanis Tonnellier et Klark Riethauser". Creusot Infos (in French). 5 March 2026. Retrieved 24 June 2026.
  20. ↑ "L'Elan Chalon est fier d'annoncer la signature de son jeune espoir Klark Riethauser !" (in French). Élan Chalon. 2 June 2026. Retrieved 24 June 2026.
  21. ↑ "U16 MEN – EUROPEAN CHAMPIONSHIP RECAP'" (in Italian). Swiss Basketball. 6 September 2023. Retrieved 24 June 2026.
  22. ↑ "Klark Riethauser avec la sélection Suisse !" (in French). Élan Chalon. 11 July 2025. Retrieved 24 June 2026.
  23. ↑ "Klark Riethauser (Switzerland)". FIBA. Retrieved 24 June 2026.
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