 He made a very important clean sheets in a number of matches.At the end of the 2006 season, Jung Sung-ryong went on to make twenty–seven appearances (15 in the league), as Pohang Steelers finished second place behind eventual Champions, Seongnam Ilhwa Chunma and was eliminated in the K League Championship by Suwon Samsung Bluewings.In the 2007 season, Jung Sung-ryong continued to compete with Shin Hwa-yong and new signing, Kwon Jung-hyuk over the first choice goalkeeper role.