 Jung Sung-ryong was the second choice goalkeeper in the final of the J.League Cup, as Kawasaki Frontale won 5-4 on penalty shootout after the game went extra time with a 3-3 draw.It wasn't until on 30 November 2019 when Jung Sung-ryong returned to the starting lineup, playing the whole game, in a 4-1 loss against Yokohama F. Marinos.At the end of the 2018 season, he went on to make thirty-five appearances in all competitions.