Marshal is the head football player at Pearl Bailey High School.
When Steve and his friends improve their standing at school by becoming witches in "The Witches of Langley", Steve decides to improve his cafeteria seating position by mingling in with the football team, but is rebuffed by Marshal, whom he dismisses as a dumb jock, although Barry points out that he is a member of the Federation of Christian Athletes.
In revenge, Steve turns to evil "blood magic" and turns Marshal into his personal zombie, making he chew churros for him, then depositing the food into his mouth. When Snot and the others object to Steve using evil magic, he turns the zombie Marshal loose on them and sets out to enslave the entire town. Principal Lewis kills Marshal, and sets out to stop Steve on his own, while the Federation of Christian Athletes face trying to replace Marshal, and note that they don't have to settle for a quarterback to be the star player.
After the boys succeed in stopping Steve, they reset everything to as it was before they discovered witchcraft. To get their original lunch table back, they get Marshal and the football team to beat them up, so they have an identifiable clique.
Previously, he played dodgeball against Steve and his friends in "The Scarlett Getter".
Marshal is seen in the school cafeteria in "Mean Francine".
Marshal is voiced by Ryan O'Flanagan.