Lee Jae-Sung is a 34-year-old professional football player from KOR. He currently plays for 1. FSV Mainz 05, wearing the number 7 shirt. At the international level, he represents South Korea. He plays primarily as a Midfield. He stands at 180cm tall and weighs 70kg. His preferred foot is Left. His current market value is estimated at 2M €.

His most recent move was a from Holstein Kiel to 1. FSV Mainz 05 on 2021-07-08.

Across 22 appearances in the Bundesliga 2025-2026, Lee Jae-Sung registered 2 goals and 2 assists, while completing 20 key passes out of 546 total passes with a passing accuracy of 19.2.