According to Valerie Wigglesworth of the Dallas Morning News, a state trooper clocked Elliott driving 100 miles per hour in a 70 mph zone.
Elliott's no contest plea was entered and accepted on July 5, but his conviction was recorded on July 14.
The NFL's reigning rushing yardage leader has been embroiled in myriad legal issues lately, including an alleged altercation at a bar Sunday.
Per Kate Hairopoulos and Naheed Rajwani of Dallas SportsDay, a source indicated Elliott was involved in a fight that resulted in a man being struck and taken to hospital.
Police have not named Elliott as a suspect, and the NFL is currently looking into the matter.
Also, Elliott is under investigation by the NFL regarding an allegation of domestic violence from 2016.
According to TMZ, a 20-year-old woman said Elliott assaulted her in Columbus, Ohio.
No charges were brought against Elliott, however, due to what the Columbus City Attorney's Office called "conflicting and inconsistent information," per ESPN.com's Jean-Jacques Taylor.
Despite that, ESPN's Adam Schefter reported last week that Elliott is bracing for a "short suspension" from the NFL.
Elliott rushed for 1,631 yards and 15 touchdowns as a rookie last season en route to the Pro Bowl and a First-Team All-Pro selection.