Born in Biała Podlaska, Hołownia started his career with Legia Warsaw. He made his professional debut with the club on 9 July 2014 in the Polish Super Cup against Zawisza Bydgoszcz. He came on as an 89th-minute substitute for Bartosz Bereszyński as Legia lost the cup 3–2.[1] In coming on for Legia, Hołownia became the youngest ever player to appear for the club.[2]
On 29 July he was loaned to Ruch Chorzów.[3] On 7 February 2019, he was then loaned out to Śląsk Wrocław for the rest of the season.[4]
International
Hołownia has appeared for numerous Poland youth international sides.