Ghana centre-back Riis Opoku Twumasi has joined Slovakian club STK Samorin from FC Sheriff on a free transfer.The 20-year-old defender moves to Samorin from Moldovaâ??s top flight, with the club competing in Slovakiaâ??s II. Liga. The deal was completed on 16 September 2026, marking Twumasiâ??s latest step in a career that has taken him between Ghana, Moldova and Slovakia.Twumasi was born in Kumasi and stands at 1.87m. He is listed primarily as a centre-back and represents