PHILADELPHIA — The NBA has opened an investigation into the 76ers for possible tampering in their free agency pursuits to re-sign James Harden and sign P.J. Tucker and Danuel House, a source confirmed to The Philadelphia Inquirer Friday night. The Sixers had the cap space to sign Tucker to the full mid-level exception and House to the bi-annual exception because Harden declined his $47.4 million player option for the 2022-23 season and re-signed with a paycut of about $14 million for this season. Harden’s new two-year deal also includes a player option for $35.6 million for the 2023-24 season….
