Joaquin Niemann is penalized at the US Open after throwing a club during play. According to reports from Winnipeg Free Press and Channel NewsAsia, officials assess a two-stroke penalty for the incident. The penalty is issued under the rules governing player conduct and equipment handling during a round. Both outlets describe the same core action and the resulting penalty, indicating that the matter is treated as an on-course breach rather than a withdrawal or disqualification. The reports do not indicate that Niemann is removed from the competition, but they state that the penalty affects his scoring for the round. With the US Open ongoing, the incident becomes a disciplinary moment that shifts Niemann’s position in the field by adding two strokes. Details beyond the penalty and the club-throwing incident are limited in the provided summaries.