In Brussels, he was at the age of 16 when he transferred to the Oud-Heverlee Leuven youth team.
Yagan was promoted from the youth squad of Oud-Heverlee Leuven to the first team at the beginning of the 2012-13 season and was allowed to play for the first time on 25 November 2012, when he was subbed on in injury time for Günther Vanaudenaerde in a 1-1 draw away to Genk.
[2][3] Following the 2014-15 season, the contract of Yagan with OH Leuven ended and he was released.
Near the end of October 2015, he signed as a free player for Heist.
This biographical article related to association football in Belgium, about a forward, is a stub.