[5] He then won three silver medals at the 2017 Olympic Hopes Cup- on floor exercise, pommel horse, and still rings.

[3] Mészáros began the 2022 season at the Osijek World Challenge Cup, finishing eighth on floor exercise, fourth on pommel horse, and fifth on parallel bars.

[16][17] In the floor exercise final, he won the silver medal behind the defending Olympic champion Artem Dolgopyat.

[22][23] He won four medals at the 2023 Tel Aviv World Challenge Cup- gold on floor exercise and vault and silver on pommel horse and parallel bars- making him the most decorated gymnast of the event.

[26] At the end of the World Challenge Cup series, he was ranked first on parallel bars and top five on every event besides still rings.

[28] As one of the top eight gymnasts not from a country that qualified a full team, he earned an individual quota for the 2024 Olympic Games.