Gridiron

Gridiron is the coach of the Thunderbolts team. He is shown to be very obese. Relating to the Thunderbolts' losing streak, he tends to yell at his team when they lose a game, or if they just goof up at some point.

Appearance
He appears to be a huge robot due to his massive size. He has blue eyes like the rest of the Thunderbolts. He also appears to weigh 2210 pounds, shown in A Kinder, Gentler Gridiron. His head appears to weigh 10 pounds also shown in that episode. He wears a necklace with a whistle.

Personality
Gridiron is a very cranky coach. Whenever something goes wrong, his hydraulic fluid goes up, causing his body to turn red, and it shoots into the air. His personality is based on a drill sergeant in a military service.