Tom Brady's hyping himself up before his first broadcasting debut ... quite literally, 'cause a promo for his first appearance shows him talking to past versions of himself.
Fox released the clip before Brady took to the booth to commentate on the Cleveland Browns vs Dallas Cowboys Sunday ... starting off with the current Brady hearing credits telling him he can't be a commentator.
Before he gets too down on himself ... past versions of himself -- one from his Patriots days, one from his tenure with the Bucs and a college version of himself from the University of Michigan -- give him a pep talk.