Earl is a supporting character in the Spawn comics
Shortly after returning to Earth after his war in Hell, Al Simmons joined the Southpawto retrain himself to fight without his powers, and to maybe find some allies. Earl was one of several fellow patrons that began to befriend Al, particularly over their shared military backgrounds.
Eventually, Al decided to invite Earl to join him on his crusade against evil, beginning with a drug cartel in the city. Earl reluctantly agreed to help from time to time, particularly because Al offered to help pay for Earl's mother's medical care. Earl later appears in the following issues where he stops a fight between Al and Terry who were talking about dealing with the villain known as Soul Crusher.