Career
Zajączkowski was part of Poland"s 4 × 400 metres relay at the 2003 World Indoor Championships, together with teammates Rafał Wieruszewski, Marcin Marciniszyn and Marek Plawgo. The team originally finished in 4th place, but received bronze medals after the 1st place United States of America team was later disqualified. 100 metres – 10.58 s (2004)
200 metres – 20.95 s (2004)
400 metres – 45.93 s (2004).
