Lukas Klemenz

Klemenz started his career in Fortuna Głogówek. After a few weeks, he left the club and joined Sparta Prudnik. After two years of playing in Prudnik, he returned to Fortuna. Next, he continued his youth career with Pomologia Prószków. In 2011, Klemenz started his senior career with Odra Opole in III liga. He left Odra in 2013 to sign with French club Valenciennes FC. In 2015, he came back to Poland. He played in Korona Kielce, GKS Bełchatów, Olimpia Grudziądz and GKS Katowice. On 1 July 2018, he signed a contract with Jagiellonia Białystok. On 21 January 2019, Klemenz moved to fellow Ekstraklasa club Wisła Kraków. On 22 January 2021, he joined Budapest Honvéd. On 23 June 2023, Klemenz returned to Poland and joined I liga side Górnik Łęczna on a two-year contract. On 24 June 2024, he re-signed with Ekstraklasa returnees GKS Katowice, and penned a deal until the end of June 2026. In January 2026, Klemenz signed a new two-and-a-half-year contract with GKS Katowice, valid until June 2028 and including an extension option. During the autumn part of the 2025–26 season, he made 17 appearances and scored four goals.

Klemenz was born in Germany to a Polish mother and an American father. His family moved to Poland when he was young.

Odra Opole

III liga Opole–Silesia: 2012–13 Individual

I liga Player of the Season: 2016–17 I liga Centre-back of the Season: 2016–17 I liga Team of the Season: 2016–17