Kacper Wełniak (born 21 May 2000) is a Polish professional footballer who plays as a forward for Ekstraklasa club Motor Lublin.
[1] On 1 March 2013,[3] during testing for Legia's academy,[4] he sustained a fibula and tibia fracture and underwent surgery,[5] with his rehabilitation lasting until November.
[3][5] During the 2014–15 season, he signed a contract with Legia Warsaw's academy, where he stayed until the rest of his youth career.
[1][6] Before his transfer, Arka Gdynia, Lech Poznań, Lechia Gdańsk and Zawisza Bydgoszcz youth teams were interested in contracting him.
[3] He made his debut in Legia's second team on 14 June 2017, coming off the substitutes' bench in the 68th minute of a 1–2 home loss to MKS Ełk.
[10][11] Wełniak made his debut in II liga on 16 March 2019 during a 2–2 draw against Znicz Pruszków, during which he came in as a substitute in the 79th minute.
[21] Wełniak scored his first two goals on 25 September 2020, during a 2–0 victory with Śląsk Wrocław II, when he came off the bench in the 12th minute of a match as a consequence of an injury sustained by Cezary Sauczek.
[27][28] On 17 January 2023,[29] he was loaned to the I liga side Motor Lublin, with an option to make the move permanent.
On 19 October 2024, in the 86th minute of a 3–4 home loss over Widzew Łódź, he scored his premiere goal in Polish top league.