Lee Tae-seok

He joined FC Seoul in 2021. He made his league debut on 7 April 2021, against Ulsan Hyundai. On August 1, 2024, he moved from Seoul to Pohang Steelers in a trade with Kang Hyeon-mu.

He was part of the South Korea squad at the 2019 FIFA U-17 World Cup. Lee made his debut for the senior South Korea national team on 14 November 2024 in a World Cup qualifier against Kuwait at the Jaber Al-Ahmad International Stadium. He substituted Lee Myung-jae in the 64th minute as South Korea won 3–1. He made his first appearance for South Korea national team as a starter rather than a substitute on March 20, 2025, against Oman in the third Asian qualifying round of the North and Central American World Cup against Oman. He started at left fullback in a World Cup qualifier against Jordan on March 26 and played the full 90 minutes, putting in a strong defensive performance, winning five of his six tackle attempts and winning all six ground ball contests. Lee scored his first international goal on 18 November 2025 in a friendly against Ghana at the Seoul World Cup Stadium. He was called up Myung-Bo Hong to be part of the 2026 FIFA World Cup squad.

Like his father, former soccer player Lee Eul-yong, he has a precise and sharp left foot. He can play wing and left fullback, and his wide vision and left-footed kick allow him to deliver sharp long passes and crosses. Once considered a weakness, his defense and physicality have improved greatly in recent years, and in the national team game he shut down Jordanian winger Al-Taamari to perfection.

Club

As of 13 September 2026.

International

As of match played 24 June 2026

Scores and results list South Korea's goal tally first, score column indicates score after each Lee goal.