Her personal best of 71.40 m, set in 2021, is the Polish record as well as the third best result in the history of the women's javelin throw competition.

On 16 August 2016, she achieved her personal best and a new Polish national record – 67.11 metres – while competing in the qualifying round.

She returned to competition in June 2018 but could not build a good enough form for the 2018 European Championships in Berlin.

In the 2020 Summer Olympics held in Tokyo, Andrejczyk won the silver medal in the Women's Javelin Throw.

[6] Maria Andrejczyk auctioned off her Tokyo Olympic silver medal to help fund the heart surgery of an 8-month-old baby.