According to Adrian Wojnarowski of ESPN, the NBA has opened an investigation into the Philadelphia 76ers for possible tampering and early contact centered on the franchise’s summer free agency class of James Harden, P.J. Tucker, and Danuel House. The Sixers have begun cooperating with the league on the probe.

NBA’s expected to pursue circumstances surrounding Harden declining $47 million option to sign a 1+1 deal that cut salary to $33 million and gave the team more flexibility to sign Tucker and House. Some have wondered if another deal was already in place for the future – which is against CBA rules.