The NFL Players Association has appealed the 10-game suspension handed down to defensive lineman Greg Hardy, The Charlotte Observer reported on Monday.
The league announced last week that Hardy would be suspended 10 games without pay for conduct detrimental to the league.
The Dallas Cowboys signed Hardy to a one-year contract in March. The timeline of the suspension means Hardy's first game as a member of the Cowboys will be against his former team, the Carolina Panthers.
Last July, Hardy was found guilty on misdemeanor domestic violence charges. After he played in one game with the Panthers last season, Hardy was played on the Commissioner's Exempt List. He still made $13.1 million in 2014 after the team placed the franchise tag on him.
In 2013, the 26-year-old Hardy recorded 65 tackles and 15 sacks and was invited to the Pro Bowl.
Hardy was set to stand trial in February after appealing the conviction, but the charges were dismissed after his accuser reportedly could not be located by prosecutors. Hardy reportedly reached a financial settlement with the accuser.
Earlier this month Hardy filed a petition to expunge the domestic violence charges against him.