National Basketball Players Association executive director Billy Hunter and union general counsel Gary Hall failed to get proper player representative approval for a five-year, $15 million contract extension for Hunter in 2010, Yahoo! Sports has learned.

Players Association executive director Billy Hunter guided the union through last year’s lockout. (AP)The possible violation of the NBPA’s constitution raises questions about the legitimacy of Hunter’s contract and his future as executive director.

via Adrian Wojnarowski of Yahoo! Sports.