It has been a tough season for Derek Fisher. Traded to Oklahoma City from the Lakers, where he won five NBA championship rings. Serving as president of the players association during the polarizing lockout. And now he's fighting to keep that union position. CBSSports.com reports Fisher has vowed not to resign his NBPA post, and that he's still pushing for an audit of the union's business practices.

Fisher may be fighting a losing battle, given that the union's executive board voted 8-0 this week to ask for resignation. Fisher's request for an audit is perhaps the final chapter of his power struggle with the union's executive director, Billy Hunter. CBSSports.com says it has been told the audit would cost from $200,000-$400,000, and that the executive board now believes it is unwarranted.

The executive board vote was reported first by Yahoo, which says Hunter has launched an "all-out assault" to oust Fisher in recent days. Yahoo reports the audit was initially approved by the executive committee, but then scrapped at Hunter's urging. Fisher has two years left on his presidential term.