Keum-Bok Ko has officiated 62 matches on record, averaging 0.0 cards and 0.0 fouls per game โ a lenient official. Home teams win 47% of matches under him, drawing 27% and losing 26%. Most active in the K League 1 (62 matches). 23% of his bookings come after the 75th minute, with the first card around the 22'.