Choo Seung-gyun (born December 6, 1974) is a South Korean retired professional basketball player and coach.

He spent his entire 15-year playing career with Korean Basketball League team Jeonju KCC Egis, who retired his number 4 jersey.

[3] In the 1997 National Basketball Festival, he went on to become the competition's top scorer, beating the likes of Seo Jang-hoon (Yonsei) and Hyun Joo-yup (Korea).

[5] Choo, being the tallest of the threesome, was often tasked with defensive duties and also provided an added option around the paint due to his accurate shooting.

[6] Although Choo was largely overshadowed by his more flamboyant teammates, he gained a reputation for his cool and calm demeanor during high-pressure and clutch situations, which is reflected in the fact that he was the league's free throw percentage leader for a record six seasons.

[7] His unflashy yet consistent playing style and clean private life earned him the sobriquet "Silent Strong Man" (소리없이 강한 남자), a contrast to colorful nicknames assigned to his contemporaries such as "Rambo Shooter" (Moon Kyung-eun), "Bullet Man" (Shin Ki-sung), "Airborne" (Chun Hee-chul) and "Magic Hippo" (Hyun Joo-yup).

After retiring as a player, Choo remained at Jeonju KCC Egis as a member of the coaching staff under Hur Jae, having previously played under him.