Benedict took part in the Senior Bowl in January, the first Division II player to do so since 2004, and was invited to last month's NFL Combine.
"He was a big, tough man, but he had a very gentle heart," Newberry president Mick Zais said. "He was a teddy bear."
Benedict, who redshirted at Tennessee in 2002 before moving to Newberry, was a native of the Netherlands. He played high school football at the Peddie School in Hightstown, N.J.
Jacksonville police spokesman Ken Jefferson said Benedict's body was taken to the medical examiner's office to determine the cause of his death. He was found dead Wednesday evening.