Johnny Manziel and his agent Erik Burkhardt have a complicated history.
Burkhardt first represented Manziel when the quarterback was selected No. 22 overall by the Cleveland Browns in the 2014 NFL draft.
But in 2016, Burkhardt fired the former Aggies star.
"It was the toughest thing I had to do in my career," Burkhardt told John Middlekauff on Fox Sports 1's 'The Herd.'
"(I told him) 'OK, I've got your next situation figured out after Cleveland or whatever it is. I need you to be great for a month.' And he would do that and then the situation would come about and it was wheels off again. And I said 'you know what, it's to the point where it's hurting you personally.' "
He later went on to say that he continued to help Manziel on a personal level, but not a professional one.
After Manziel took steps to get control of his personal life, he approached Burkhardt about a NFL comeback attempt. Burkhardt said that before he would represent Manziel, his former client would need to satisfy a long list of requirements.
Once they were met, the two resumed their professional relationship.
In late March, the former Cleveland Browns quarterback looked sharp when he took the field for the pro day at Texas A&M.
In late May, Manziel signed with the Hamilton Tiger-Cats of the Canadian Football League.