[1][2] He went to play in Belgium for Standard Liège, making his Belgian First Division debut under coach Aad de Mos on 31 August 1997 in a 3–0 away victory against Germinal Ekeren.
[1][3][4] He spent a total of five seasons at Standard, reaching two Belgian Cup finals under the guidance of coach Tomislav Ivić, however both of them were lost.
[2][4][6][7][8] In the following season The Red Dogs had the objective of reaching the Champions League group stage, Blay playing in both legs of the third qualifying round against Lazio Roma, which however was lost with 4–2 on aggregate.
[2][9][10][11][12][13] In 2009 he went to play at Internațional Curtea de Argeș and Unirea Urziceni, before in 2011 he returned to Belgium and signed with Royal Antwerp in the Belgian Second Division who bought him to replace Bart Van Zundert, retiring at the end of the 2011–12 season.
[1][2] George Blay played 7 games and scored one goal for Ghana, making his debut under coach Giuseppe Dossena on 8 April 2000 in a 1–0 away victory against Tanzania at the 2002 World Cup qualifiers first round.