His first major medal came at the
1978 European Athletics Championships, where he anchored the Polish
4 × 100 metres relay team of
Zenon Nowosz,
Zenon Licznerski and
Leszek Dunecki to the
gold medal in the event. He won the bronze in the 100 m at the
1979 IAAF World Cup, running for Europe. He competed for Poland in the
1980 Summer Olympics held in Moscow, Soviet Union in the 100 and 200 he reached both finals finishing seventh in both sprints. In the 4 × 100 metres relay he won the
silver medal with his teammates
Krzysztof Zwoliński, Licznerski and Dunecki. In 1981 he ran with the Polish/Europe sprint relay team that won the gold at the
1981 IAAF World Cup in Rome. He won a bronze in the 100 metres at the
1982 European Athletics Championships. His fastest time for the 100 m was 10.00 seconds, recorded in 1984 in
Warsaw with wind on the maximum allowable limit of 2.0
m/s. This was the
European record for the event until
Linford Christie ran 9.97 sec at the
1988 Seoul Olympics. Although Woronin's official timing read as 10.00 seconds, this was rounded up from 9.992 seconds – so this represents the first time that a Caucasian (and a European) broke the
10-second barrier in this event, albeit unofficially. Woronin's personal best in the 200 m was 20.49. ==International competitions==