Former Cleveland Browns star Joe Thomas just went scorched earth on Jim Irsay ... blasting the Colts owner for hiring "drinking buddy" Jeff Saturday as Indy's next head coach.
Thomas, who played 11 years in the league, didn't hold back a thing while appearing on NFL Network's "Good Morning Football" on Friday ... calling the Saturday hire "the most egregious thing I can ever remember happening in the NFL."
"It is one of the most disrespectful things I have ever seen in my entire life," the ex-offensive lineman said.