Blackmon, 23, sat out the first four games of the 2013 season with a suspension after an April substance abuse violation and has two previous arrests for driving under the influence, one in 2012 and one when he was at Oklahoma State in 2010. The second violation means Blackmon will miss the remainder of the season, according to ESPN's Chris Mortensen.
Jaguars general manager Dave Caldwell released a statement on Friday following the suspension:
"All of us who are a part of the Jaguars family care very deeply about Justin and his well-being. That said, he must be held accountable and accept the consequences announced today by the NFL. His suspension will provide him the opportunity to receive the attention and professional treatment necessary to overcome his challenges, and we will support him during this time. The Jacksonville Jaguars will evaluate Justin's status once he has successfully met the criteria to be considered for reinstatement to the league."
Blackmon, a first-round selection in the 2012 NFL Draft, tallied 29 receptions for 415 yards in four games, including 14 receptions for 190 yards against the Denver Broncos in Week 6. Blackmon accumulated 64 receptions for 865 yards and five touchdowns as a rookie.