 During that season, he led the Majors in earned run average (ERA) and achieved an ERA of 1.26 through his first 14 starts, the lowest by a Dodgers pitcher since the statistic became official in 1912.Ryu was born in Incheon, South Korea on March 25, 1987, and attended Incheon's Dongsan High School.He is working towards a master's degree in community physical education in Daejeon University.