Richard Seymour's decision to report to the Raiders cancelled a move by the NFL Players Association to file a grievance on his behalf.
The NFLPA's associate executive director for external affairs, George Atallah, confirmed to Yahoo! Sports that the union had filed a grievance on Friday after the defensive lineman received a "five-day" letter from the Raiders.
When Seymour decided to join the Raiders, the union dropped the matter.
Union No Longer Pursuing Grievance For Seymour