Since he wears a hat with an American flag on it, it could mean he was a veteran of some sort. This may not be the case and he could simply be patriotic.
Even though he is older himself, his mother is still alive.
His voice actor, Kurtwood Smith, is known for playing his roles of Clarence J. Boddicker from the 1987 cyberpunk action film Robocop and Red Forman from the sitcom That 70's Show.
He dislikes Pig for helping and all of his actions, causing Pig to start crying.
