He won the silver medal at the 2023 World Wrestling Championships in Belgrade, Serbia, losing 8-7 to his Turkish rival Ali Cengiz in the men's Greco-Roman style 87 kilo final match. On 15 November 2023, the United World Wrestling recognized that a serious refereeing mistake had been committed which changed the outcome of this bout. Therefore, the UWW declared both wrestlers as the winners of the contest and award a gold medal to Dávid Losonczi.[7] Dávid Losonczi defeated Kyrgyz Azat Salidinov 8-0 with a technical superiority in the second round, Azerbaijan's Islam Abbasov 8-0 with a technical superiority in the third round, and in the quarter-finals he defeated Belarusian Kiril Maskevic 6-1, who participated as an independent individual athlete, to reach the semi-finals. In the semi-final, he defeated Semen Novikov of Bulgaria with 10-0 technical superiority and reached the final.[8]
He represented Hungary at the 2024 Summer Olympics in Paris, France.[9] He lost his bronze medal match in the 87kg event at the Olympics.[1]