[1][2] In 1941 he went to play for Kolozsvári AC, his first Nemzeti Bajnokság I match for them being on 31 August when under the guidance of coach Béla Kovács he scored a brace in a 3–0 win over Diósgyőri MÁVAG.
[1] In 1946 he went to play for ITA Arad, making his Divizia A debut on 25 August under the guidance of his former coach from Kolozsvári, Zoltán Opata in a 5–1 away win with Libertatea Oradea, by the end of the season scoring 26 goals in 23 matches, being the league's top-goalscorer as the team won the first title in its history.
[2] Although born in Hungary, Ladislau Bonyhádi played three games for Romania's national team, making his debut on 26 October 1947 when coach Ferenc Rónay sent him on the field at half-time in order to replace Gheorghe Váczi in a friendly which ended 0–0 with Poland.
[2][10] Bonyhádi was described in a press report from July 1946 as a strong player who could pass the opponents defense with his physical force, being known to shoot equally powerfully with both legs.
[2] Bonyhádi managed to flee from Hungary's communist regime during the Hungarian Revolution of 1956, settling in the United States.