It was fun while it lasted. After spending 18 years over at Def Jam, Shawn Pecas Costner is hanging it up and taking his talents over to Jay Z's Roc Nation Sports. According to Rap Radar, Pecas is chucking the deuces for his new role as Senior Management Executive at Roc Nation Sports. Last year, Pecas was named the Executive Vice President of Def Jam. Pecas will begin his new role with the Roc December 1. Roc Nation just recently bolstered their roster and nabbed Dallas Cowboys star receiver Dez Bryant. Jay keeps winning.