Fornal won silver medals at the 2024 Summer Olympics and the 2022 World Championship as well as the 2021 Polish Champion title with Jastrzębski Węgiel.

He subsequently entered the youth squad of PGE Skra Bełchatów and won bronze medal at the Polish Junior Championships with the team.

[2] In 2016, he made his debut in PlusLiga, Poland's highest level professional volleyball league, by joining Czarni Radom.

[15][16] The same year, he won a silver medal at the 2022 World Championship jointly held in Poland and Slovenia, losing in the final to Italy (1–3).

[21] His father, Marek, is a former volleyball player, a two–time Polish Champion (1988, 1989) with Hutnik Nowa Huta while his mother, Dorota, is a PE teacher.