Career
Born in Sosnowiec, Grunt made his professional debut with local club Zaglebie Sosnowiec, scoring a goal on that match. He then signed for Polonia Warszawa. A lack of first team opportunities saw him return back to his old club the following season.
He became the topscorer for the reserve team
On 5 July 2013, he signed for Braga B, playing in Segunda Liga (second tier of Portuguese football) on a four year contract. On 7 December, he scored his debut goal for his club in a 2–1 defeat to Maritimo B.
