On 3 March 2019 he made debut for FK Žalgiris in A Lyga against FK Palanga.1
On 20 November 2023 m. announced that Vareika left Žalgiris.2
On 30 December 2023 he signed with Hegelmann Club.34
On 3 March 2024 m. Vareika made debut in A Lyga match against Transinvest.567 In 58 minute Vareika scored the goal, bur Hegelamann lost the match.
In January 2025 was broken contract with FC Hegelmann.8
On 25 February 2025 made his debut in Armenian premier League against FC Alashkert. In this match Vareika scored goal and Pyunik won 2-0.9
Vareika made his debut for the senior Lithuania national team on 26 March 2024 in a Nations League play-out game against Gibraltar.10
https://alyga.lt/rungtynes/2019-03-03-zalgiris-palanga/901 https://alyga.lt/rungtynes/2019-03-03-zalgiris-palanga/901 ↩
IŠSISKYRĖ KELIAI SU M. VAREIKA https://fkzalgiris.lt/zalgirio-ir-m-vareikos-keliai-issiskyre/ ↩
https://fchegelmann.com/po-5-metu-sostineje-matas-vareika-keliasi-i-kauna/ https://fchegelmann.com/po-5-metu-sostineje-matas-vareika-keliasi-i-kauna/ ↩
https://www.sportas.lt/naujiena/490444/po-5-metu-sostineje-m-vareika-keliasi-i-kauna https://www.sportas.lt/naujiena/490444/po-5-metu-sostineje-m-vareika-keliasi-i-kauna ↩
2024-03-03 Hegelmann 2-3 Transinvest (alyga.lt) https://alyga.lt/rungtynes/2024-03-03-hegelmann-transinvest/1681 ↩
2024-03-03 Hegelmann 2-3 Transinvest (Soccerway) https://us.soccerway.com/matches/2024/03/03/lithuania/a-lyga/hegelmann-litauen/transinvest-vilnius/4321128/ ↩
https://lietuvosfutbolas.lt/rungtynes/fc-hegelmann-fk-transinvest-17400086/ https://lietuvosfutbolas.lt/rungtynes/fc-hegelmann-fk-transinvest-17400086/ ↩
M.Vareika pradeda legionieriaus karjerą https://www.sportas.lt/naujiena/513677/m-vareika-pradeda-legionieriaus-karjera ↩
M.Vareikos debiutas Armėnijoje pažymėtas įvarčiu ir pergale https://www.sportas.lt/naujiena/515987/m-vareikos-debiutas-armenijoje-pazymetas-ivarciu-ir-pergale ↩
"Lithuania v Gibraltar game report". ESPN. 26 March 2024. https://www.espn.co.uk/football/match/_/gameId/663887/gibraltar-lithuania ↩