Park "Ruler" Jae-hyuk (Hangul: 박재혁) is the AD carry for KSV eSports. He was previously known as Bung.
Park "Ruler" Jae-hyuk played as Bung for Stardust in Challengers Korea 2016 Spring. They finished third in the regular season, ahead of Ever8 Winners and behind Ever. In the Spring Playoffs, they were eliminated in the first round. During the midseason break, Ruler left Stardust and joined Samsung. To make room for his entry, former ADC CoreJJ moved to support.
During the 2016 LCK Summer Split, Ruler managed to impress with his performance, leading the English OGN casters to dub him as the unofficial rookie of the split. This earned him the starting ADC spot over Stitch. They managed to take fourth place with a 12-6 series record, seeding them into the first round of the 2016 LCK Summer Playoffs. Though they summarily defeated the Afreeca Freecs in the first round, they were matched against KT Rolster, a team who they had never managed to beat post-S4 in the LCK era, and they were swept 3-0, giving them fourth place in the season. Their accumulated points gave them enough to qualify as the second seed in the 2016 Season Korea Regional Finals. In a rematch against the Afreeca Freecs, Samsung managed to beat the Freecs 3-1, moving up to the finals in a rematch against KT Rolster. Samsung upset the heavy favorites 3-2, breaking a 19 game losing streak and giving them the third seed to worlds.
At the 2016 Season World Championship, Samsung were drawn into Group D along with NA's Team SoloMid, China's Royal Never Give Up, and Europe's Splyce.