A former Oklahoma State superstar has been suspended indefinitely for violating the NFL's substance abuse policy, ESPN reported Friday.Blackmon's suspension begins immediately and he won't be eligible for reinstatement until next year."All of us who are a part of the Jaguars family care very deeply about Justin and his well-being," Jacksonville general manager David Caldwell said. "That said, he must be held accountable and accept the consequences announced today by the NFL."His suspension will provide him the opportunity to receive the attention and professional treatment necessary to overcome his challenges, and we will support him during this time. The Jacksonville Jaguars will evaluate Justin's status once he has successfully met the criteria to be considered for reinstatement to the league."Blackmon was suspended the first four games of this season for violating the league's substance abuse policy.