The former Oklahoma State star appeared in an Oklahoma courtroom for the first time Monday since his weekend arrest for suspicion of drunken driving.
Blackmon was allowed to remain free on $1,000 bond.
Police arrested Blackmon during a traffic stop in Stillwater early Sunday after a breath test allegedly showed his blood alcohol content to be three times the legal limit.
Blackmon left the courtroom surrounded by friends. His attorney, Cheryl Ramsey, declined to comment.
The Jaguars selected Blackmon fifth overall in April's draft. A team spokesman said Sunday that the Jaguars are trying to learn more about the arrest and had no comment.
Information from The Associated Press contributed to this report.