Chett Englebrick is an martial artist and founder and president of the Mixed Martial Arts Ultimate Punch, Kick and Choke Championship. He weighs 150 pounds and fights against anyone except a man of the same size as him.
When Marge wanted to stop the championship in Springfield, she entered the septagon before the match and refused to leave it until the arena is torn down. Chett agreed to do it, but only under one condition: Marge had to beat him in the septagon.
At the match, Chett told Marge that he didn't want to hurt her, but he hit her so hardly she couldn't stand up. Bart entered the septagon to protect Marge, but Chett caught him and was about to hit him too. This gave Marge courage and she beat Chett. When he told her to turn her back and take a bow, he tried to attack her from behind, but failed, because Marge expected it.