<P> In 2004 , Cohen left IDJMG for Warner Music Group , and was replaced by former Arista - now Epic executive L.A. Reid . An unhappy Liles eventually decided to follow Cohen to Warner . A bidding war for Jay - Z 's contract began , and Reid appointed Jay - Z president of Def Jam . </P>
<P> In 2004 , Cohen left IDJMG for Warner Music Group , and was replaced by former Arista - now Epic executive L.A. Reid . An unhappy Liles eventually decided to follow Cohen to Warner . A bidding war for Jay - Z 's contract began , and Reid appointed Jay - Z president of Def Jam . </P>
when did jay z became president of def jam
when did jay z became president of def jam
2004
2004