[1][5] Lalayan won the bronze medal in the men's +109 kg event at the 2021 European Weightlifting Championships held in Moscow, Russia.

[6][7] At the 2021 European Junior & U23 Weightlifting Championships in Rovaniemi, Finland, he won the gold medal in his event.

[8] He won the silver medal in the men's +109 kg event at the 2021 World Weightlifting Championships held in Tashkent, Uzbekistan.

[9][10] the 2023 Asian Weightlifting Championships held in Jinju, South Korea, matching his PR total of 464 kg.

In August 2024, he finished in second place and won a silver medal in the men's +102 kg event at the 2024 Summer Olympics held in Paris, France.