On 16 June 2017, Świerczok signed a contract with Zagłębie Lubin.[2] He was a member of Zagłębie's squad for half season, scoring 17 goals in 25 games in all competition.
Ludogorets Razgrad
On 19 January 2018, Świerczok completed a move to Bulgarian club Ludogorets Razgrad for €1 million on a long-term contract.[3] He made his debut for the team on 15 February 2018 in a Europa League Round of 32 match against Italian grand Milan.[4] At the end of the week he completed his First League debut against Botev Plovdiv.[5] His debut goal came on 23 March 2018 in a league match against Etar.[6] On 6 April 2018, coming as a substitute, he helped his team to take the title derby against CSKA Sofia by scoring 2 goals for the 3–2 win.[7]
Nagoya Grampus
On 20 July 2021, Nagoya Grampus announced the signing of Świerczok from Piast Gliwice.[8]
In December 2021, Świerczok was suspended from football activities after testing positive for a banned substance in a doping test conducted after a match against Pohang Steelers, for the AFC Champions League.[9] On 28 October 2022, Nagoya Grampus released a public statement, communicating the punishment issued by the AFC would be a 4-year ban for the player on all football-related activities, counting from 9 December 2021, where a provisional ban was issued against him.[10]
Return to Zagłębie
In early February 2023, following an appeal, the Court of Arbitration for Sport overturned Świerczok's ban and cleared him of any wrongdoing.[11] Shortly after, on 10 February 2023, he returned to Zagłębie Lubin on a deal until the end of the season, with a one-year extension option.[12] On 30 May, it was announced he would leave the club at the end of June.[13]
Omiya Ardija
On 6 July 2023, Świerczok returned to Japanese football after signing with J2 League side Omiya Ardija.[14] On 30 September, in a match against Ōita Trinita, he left the pitch after 24 minutes after suffering a lateral collateral ligament tear in his right knee.[15] Despite Omiya suffering relegation to J3 League at the end of the 2023 season, Świerczok extended his contract for another year.[16]
Śląsk Wrocław
On 17 September 2024, Świerczok joined Polish top-flight club Śląsk Wrocław for the remainder of the season.[17]
International career
Świerczok's first experience of international football came in 2011 with Poland U20.[18] In 2012, he made three appearances for the Poland U21.
On 3 November 2017, Świerczok was called up to the Poland senior team for the first time, for their friendlies with Uruguay and Mexico.[19] He made his debut on 10 November against Uruguay, replacing Kamil Wilczek for the final 23 minutes.[20]
Personal life
In March 2020, Świerczok and his girlfriend helped out a 73-year-old woman who had fainted near her home in Razgrad, by moving her away from the road and calling the medical emergency services.[21]