The Irish pundit was speaking to 2FM's Game On show.
“Pogba... if you paid £50m you'd think 'Wow, we've made a move here' but for £100m. He's nothing," suggested Dunphy.
“He just doesn't have a position you can play him in. He's never done it and I think the harsh assessment of that is that Alex Ferguson was right to let him go because he saw, what I think I have always seen... this guy doesn't have a game.
“There's no way you can play him, he does nothing well enough. He doesn't have a football brain and takes up the wrong positions all the time. I don't see anything in him and I think he's going to be a spectacular failure."