Cheongju SK Knights (1998–1999) Hyun was selected as the first overall pick in the 1998 KBL draft by the Cheongju SK Knights. He signed a five-year rookie contract totaling ₩1 billion KRW.
1998–99: Rookie season and All-Star debut In his debut on November 14, 1998, Hyun posted 26 points, six rebounds, eight assists and two steals, leading SK Knights to a 95–94 season-opening win over the
Daegu Tongyang Orions. In Hyun’s first season, he scored double-digits in 24 consecutive games which is the KBL’s longest streak of double-digit scoring as a rookie. He became the first ever rookie in the league to record a
triple-double. Hyun made history for being the first rookie named to the KBL All-Star. In his first All-Star Game, Hyun scored six points, grabbed six rebounds, dished out two assists and tacked on two steals. Since Hyun made it to the All-Star list, he was shortlisted as South Korea’s delegate to the first Asian Basketball Super League (ABSL) held from June 5 to July 16 in eight different cities of the participating countries, which includes Korea, China and Japan. Hyun played in 34 games, averaging 23.9 points, 6.4 rebounds and 4.6 assists per game.
1999–00: Sophomore season During his second season, Hyun played 15 games for the SK Knights and he recorded an average of 19.6 points, 4.7 rebounds and 6.2 assists per game. Hyun found out that he was traded from a reporter and was caught off-guard with the news. In an interview following his trade, Hyun expressed his disappointment towards the team’s coach for not giving him a heads up that a deal will be made. Hyun was named to the All-Star list for the second year in a row. He was also voted to the All-Star Best 5 by basketball commentators and reporters. For the remainder of the season, Hyun played 27 games with his new team, averaging 23.7 points, 6.0 rebounds and 7.6 assists per game.
2000–01: Injury On February 14, 2001, Hyun, injured his right ankle and knee in a game against
Daejeon Hyundai Gullivers. On February 21, he was diagnosed with two broken right ankle ligaments, inflamed and torn right ankle tendons, myositis and a knee joint damage. Hyun ended his season early with only 27 games played, averaging 16.7 points, 5.7 rebounds and 5.0 assists per game. Hyun underwent surgery at
Samsung Medical Center before joining the military.
Sangmu or Korea Armed Forces Athletic Corps (2001–2003) In June 2001, Hyun began his mandatory military service together with basketball players Shin Ki-sung, a teammate from college and the national team, and Kang Hyuk (), who was also a national team member. While in the military, Hyun was selected to play for the Sangmu or
Korea Armed Forces Athletic Corps.
2001–02: Finals MVP and injury Hyun, who was still rehabbing the injuries he incurred in the previous year, led the past year’s tournament runner-up to victory during the 2001–02 Basketball Festival (officially known as the Sewon Telecom Basketball Festival for sponsorship reasons). During the final game on January 16, 2002, he logged a double-double with 25 points and 17 rebounds in an 87–84 win over
Chung-Ang University, ending their third championship winning streak. Hyun, who only scored eight points in the first half, succeeded in a reverse
layup at the end of the third quarter making the score 63–61. In the fourth quarter, Hyun scored 17 points helping Sangmu claim the championship title. This led to people calling him "The Lord of the Military". Hyun was eventually named the Finals MVP and he received the Rebound Award. Hyun, who was still experiencing pain on his left knee and rehabilitating at that time, was highly discouraged by his doctor to take part in the 2002 Asian Games. Despite the doctor’s advice, Hyun still played and led South Korea to win its first gold medal in 20 years.
2002–03: Injury In 2003, Hyun failed to play for Sangmu as he incurred an injury on his left knee cartilage for the third time. Hyun’s case was considered alarming and risky since he received two operations in the previous year after suffering from the same injury twice. In a statement, Busan KTF Magic Wings Director Chu Il-seung () said that there was barely cartilage left in Hyun’s knee. Hence, performing the third left knee surgery will be complicated due to the difficult method of culturing and transplanting cartilage tissue. Hyun was advised by experts to get treatment abroad but was not able to do so since he was an active duty soldier. According to the South Korea law, active duty soldiers are only allowed to get treatment overseas if it is a fatal case that cannot be treated in Korea. Eventually, Hyun did not opt for a surgery, instead, he underwent rehabilitation program at Samsung Medical Center for his injured left knee cartilage. Hyun played in 44 games during the season, he posted an average of 12.9 points, 3.4 rebounds and 5.9 assists per game. In 2005, Hyun was selected to play in the first All-Star Game between the
KBL and the
CBA. The first game was held in Seoul, South Korea on January 28, where South Korea won 85–82. The second game was held in Harbin, China on January 30, where the host country won 93–77. Hyun was then named to his fourth All-Star Game appearance. Hyun, who was voted by fans, made it to the All-Star Best 5 list after four seasons. During this season, he logged 13 double-doubles, the most for the forward position. Hyun’s averages increased to 14.2 points and 3.6 rebounds per game With Hyun leading the team, the Busan KTF Magic Wings finished the season 32–22, showing a 13-game improvement from the previous year which helped them qualify for the playoffs after two years. Despite Hyun’s effort, the team was eventually eliminated by the
Seoul Samsung Thunders after losing in the first two games. Hyun posted an average of 23.0 points, 8.0 rebounds and 6.5 assists per game — all of which are his playoffs career-highs. Subsequently, he was voted into the
KBL Best 5.
Changwon LG Sakers (2005–2009) Hyun became a free agent in the offseason, he then signed a five-year deal with the Changwon LG Sakers.
2005–06 In Hyun’s first season with the Changwon LG Sakers, he received an annual salary of ₩360 million KRW, becoming the second highest paid player for the 2005–06 season (following Seo Jang-hoon of the Seoul Samsung Thunders with ₩380 million KRW). The first game was held on January 22, in Seoul, South Korea where the host country won 96–86. The second game was on January 24, in
Jiyuan, China where China won 104–85. Hyun, who was voted by coaches, made his fifth All-Star appearance. Hyun received the 2006 KBL Exemplary Player award after being selected by the league's referees and technical committee for his professional conduct on the court. During this season, Hyun did not miss a single game, he played a career-high 54 games and he averaged 11.2 points, 4.3 rebounds and 5.3 assists per game. Hyun, who was hampered by injuries, appeared in 46 games and saw a decline in his season averages, posting 9.3 points, 3.7 rebounds and 3.4 assists per game. This was the first time he recorded a single-digit scoring average. Hyun averaged 12.0 points, 2.5 rebounds and 2.0 assists over four games. The LG Sakers was eventually eliminated. He logged a game-high nine 3-point shots (alongside Seo Jang-hoon). Since Hyun postponed his surgery in the previous season, his condition worsened which affected his performance during the season.
Retirement After four left knee cartilage surgeries, Hyun decided to leave the hardwood. The Changwon LG Sakers announced Hyun’s retirement. Hyun, who had been rehabbing his knee and still had a year left on his contract with the LG Sakers, formally concluded his career after nine seasons, in a press conference on June 25, 2009.
Post-retirement In 2012, when the KBL celebrated its twelfth anniversary, Hyun was selected to play for the Legend All-Star Game. Hyun, who received the most fan votes, came in first place in the Dream Team (while
Lee Sang-min was voted first in the Magic Team). In 2017, during the KBL’s twentieth anniversary, Hyun was named to the All-Time Legend 12. The award was given to four guards, six forwards and two centers. Hyun was selected as a Legend for the forward position (alongside Aaron Haynes, Johnny McDowell,
Chun Hee-chul,
Choo Seung-gyun and
Moon Kyung-eun). == National team career ==