Answer
Jung Sung-ryong, the goalkeeper for Kashiwa Reysol, had an impressive performance in the 2020 J1 League, keeping 15 clean sheets throughout the season. This means that in 15 of the 34 matches played, Reysol did not concede a single goal while Sung-ryong was in net, showcasing his exceptional goalkeeping abilities and contributing significantly to his team's success.