Lee Tae-seok is a South Korean left-back and left winger born in Seoul on 28 July 2002. The son of former South Korea international Lee Eul-yong, he developed in FC Seoul's academy and joined the senior team in 2021, making his league debut that April. In 2024 he moved to Pohang Steelers and later joined Austria Wien. Lee represented South Korea at the 2019 FIFA U-17 World Cup and made his senior international debut in November 2024 during a World Cup qualifier against Kuwait.