The claim that the head coach of the Portland Trail Blazers was arrested for gambling charges related to the Mafia is true. The original claim came from ABC news which is generally a pretty reliable news source, but I dug deeper and found multiple other sources backing up the same thing. There is an article on ESPN detailing how head coach Chauncey Billips was one of 34 arrests made related to an illegal gambling operation which has resulted in his removal from the position as head coach. The article states: "Billups, who was arrested in Oregon, is charged in a separate indictment alleging a wide-ranging scheme to rig underground poker games that were backed by Mafia families, authorities said. The defendants are accused of using technology to steal millions from victims in the New York area". I also found another article from NBC news that states: "Billups, Miami Heat guard Terry Rozier and dozens of others were charged Thursday as part of two sweeping investigations: one into illegal sports gambling and the other into poker rigging schemes allegedly backed by the Mafia." Multiple reliable sources have proved this claim to be true, going into detail about what the charges were and who was involved.