At the beginning of his athletics career he also competed in the high jump and decathlon. He even set a Polish record in the latter in 1963. Komar's major championships debut came at the 1962 European Championships in Belgrade where he finished fourth behind compatriot Alfred Sosgórnik. In February next year he threw 18.60 metres, his first national record. In June 1964, he improved the national record to 19.50 metres, just 6 centimetres shy of the European record. This result made him one of the favourites for the October Olympic Games held in Tokyo, however, he only managed ninth place with 18.20 metres. In 1966 he set the Polish indoor record of 19.20 metres and later that year the outdoor record of 19.61. Afterwards he competed at his second European Championships in Budapest where he managed the bronze.