Tommi Grönman has officiated 84 matches on record, averaging 0.5 cards and 0.0 fouls per game — a lenient official. A player is dismissed roughly once every 21 games, and the spot is pointed to 0.02 times per match. Home teams win 43% of matches under him, drawing 29% and losing 29%. Most active in the Ykkösliiga (63 matches). 32% of his bookings come after the 75th minute, with the first card around the 38'. He cards more than 22% of Ykkösliiga 2017 referees.