Honestly, Pettis would rape Penn. Almost anyone would. The sport has passed him by. And he's obviously clueless and doesn't know what to do. He actually said for everyone to bet their life savings on him, and he said he will put on an amazing show/amazing things will happen in the octagon.
And then he got absolutely smoked.
Penn's done. He needs to accept it and retire. His delusional statements prove that he doesn't even know he needs to improve, and he's too lazy to train hard etc.