Frank Willenborg has officiated 286 matches on record, averaging 3.5 cards and 20.4 fouls per game — a balanced official. A player is dismissed roughly once every 7 games, and the spot is pointed to 0.26 times per match. Home teams win 42% of matches under him, drawing 25% and losing 34%. Most active in the Bundesliga (111 matches). 34% of his bookings come after the 75th minute, with the first card around the 34'. He cards more than 83% of Bundesliga 2025/2026 referees.