Yi Dae-seong is a strong, physical guard who uses his 190cm, 89kg frame to overpower smaller defenders and create scoring opportunities. At 35, he remains a potent offensive force in the KBL, known for his slashing ability and mid-range game. He rose to prominence with the Jeonju KCC Egis, where he developed into a go-to scorer, using a variety of post-up moves and spin drives to get to his spots. Yi's game is not reliant on elite speed but on strength, footwork, and a soft touch around the basket. He has been an All-Star multiple times and has led his team in scoring during several campaigns. A highlight of his career was a 40-point outburst in a playoff game, showcasing his ability to take over offensively. While team championships have eluded him, his individual scoring prowess is unquestioned. Known for his intense training habits, Yi Dae-seong is a veteran scorer who can still command a double-team and create his own shot when the offense stagnates.