He started his football career in the youth team of BVSC, where he was a teammate of András Törőcsik.

[3] His daughter is Erika Lazsanyi, president of the rhythmic gymnastics section of MTK, whose husband is politician Tamás Deutsch.

[4] On the evening of December 3, 2021, László Lazsanyi, as the landlord of one of the condominium apartments within Nánási út in Budapest, visited his tenant István B. who was overdue on his rental payment.

Lazsányi changed the lock, which István later broke open with a hunting knife.

[9] His former Csepel teammates Béla Kincses and György Gálhidi offering their condolences to the news of his murder.