Denver Broncos linebacker Von Miller's appeal hearing scheduled for Thursday was postponed, according to ESPN.
Miller was suspended four games for violating the NFL's substance abuse policy. He is facing further discipline following his recent arrest for failing to appear in court for an outstanding warrant.
Miller was at a gun club in Araphoe County (Colo.) at the time of the arrest. He was booked and released Sunday, which was an off day for the team.
The 24-year-old Miller had failed to show up for a scheduled court date in January after he was charged in October with careless driving, driving without a license and having no proof of insurance.
NFL Players' Association assistant executive director George Atallah has said the suspension is not for a violation of the league's PED policy.
It was not immediately known why the appeal was postponed or when it will be rescheduled. A league ruling on the appeal is expected before the Broncos' Sept. 5 opener against the Baltimore Ravens.