[1] Crețu came into prominence during the 2012–13 Liga I season, following his good performances as a central defender at CSMS Iași.
[2] In December 2016, he signed a three-and-a-half-year contract with Slovenian team Olimpija Ljubljana.
[3] In February 2018, Crețu moved to domestic rivals Maribor with which he agreed to a three-and-a-half-year deal.
He however left the club before the end of August after falling out with owner George Becali.
[6] On 4 September 2020, he debuted for the senior team in a 1–1 draw against Northern Ireland in the 2020–21 UEFA Nations League.