Robert Hartmann has officiated 350 matches on record, averaging 2.9 cards and 20.2 fouls per game — a lenient official. A player is dismissed roughly once every 10 games, and the spot is pointed to 0.18 times per match. Home teams win 46% of matches under him, drawing 25% and losing 29%. Most active in the Bundesliga (179 matches). 36% of his bookings come after the 75th minute, with the first card around the 37'. He cards more than 35% of Bundesliga 2025/2026 referees.