Lee Yoo-yeon

In October 2018, he represented South Korea at the 2018 Summer Youth Olympics held in Buenos Aires, Argentina.

In the 50m freestyle heats event, he completed at rank 9, allowing him to advance to compete in the semifinal.

[3] In the 100m freestyle heats event, he completed at rank 1, allowing him to advance to compete in the semifinal.

[9] In July 2019, he represented South Korea at the 2019 Summer Universiade held in Naples, Italy.

[12] In July 2021, he represented South Korea at the 2020 Summer Olympics held in Tokyo, Japan.