JACKSONVILLE, Fla. -- Suspended Jaguars receiver Justin Blackmon pleaded no contest to misdemeanor marijuana possession on Thursday, according to The Oklahoman newspaper.

Jaguars receiver Justin Blackmon is serving an indefinite suspension after his third violation of the NFL's substance-abuse policy. Ron Chenoy/USA TODAY Sports

Blackmon entered the plea in Edmond, Oklahoma, Municipal Court. If he does not commit any crimes in the next six months, the charge will be reduced to a misdemeanor count of disorderly conduct, the newspaper reported.

He did not speak to the media but his attorney, Robert Gray, told Judge Diane Slayton that Blackmon had recently completed a voluntary drug rehab program.

Blackmon was arrested on July 23 in Edmond after police officers stopped him for a traffic violation and could smell the odor of marijuana coming from his car.

Blackmon is serving an indefinite suspension after his third violation of the NFL's substance-abuse policy. He was suspended for the first four games of the 2013 season because of his second violation, which occurred sometime in the offseason after the 2012 season, when he caught 64 passes for 865 yards and five touchdowns.

The latest arrest was Blackmon's third, and second in Oklahoma. He was arrested in Texas in 2010 on a misdemeanor DUI charge (later reduced to underage alcohol possession) after police officers caught him speeding outside of Dallas.

He was arrested again in May 2012 during a traffic stop in Stillwater, Oklahoma, after a breath test allegedly showed his blood alcohol content to be three times the legal limit.

That arrest put him in the NFL's substance abuse program.