Moments ago, Bob Arum informed Boxingtalk.com that he has a "firm" offer of $2M on the table for lightweight king Diego Corrales to defend his WBC and WBO titles against Jose Luis Castillo on Showtime PPV later this year. "It's a firm offer! All they have to do is sign and it's done," said Arum. Full informative interview with Arum to follow shortly so stay tuned. Corrales promoter Gary Shaw, Corrales manager James Prince as well as Corrales were all unavailable for immediate comment. (6:08 PM ET)