Per Oscar Grov Heiberg has officiated 31 matches on record, averaging 3.4 cards and 12.7 fouls per game — a balanced official. A player is dismissed roughly once every 31 games, and the spot is pointed to 0.39 times per match. Home teams win 52% of matches under him, drawing 23% and losing 26%. Most active in the 2. Division: Group 2 (19 matches). 40% of his bookings come after the 75th minute, with the first card around the 38'.