Lee Kyu-seong is a South Korean professional footballer who plays as a creative midfielder for K League 1 champions Ulsan HD FC. The 31-year-old playmaker, born on May 10, 1994, is known for his technical ability and vision in the center of the park, capable of operating as an attacking midfielder or in deeper central roles. His early career was spent developing in South Korea before he established himself as a key figure for Ulsan, contributing to their domestic dominance in recent seasons. With Ulsan, Lee Kyu-seong has been part of multiple K League 1 title-winning campaigns, helping the club secure back-to-back championships with his intelligent distribution and set-piece delivery. His consistent performances have earned him recognition within the league and a stable market valuation. A technically gifted player, Lee's strengths lie in his passing range, close control in tight spaces, and his ability to dictate the tempo of a game from midfield, making him a respected figure in the South Korean top flight.