Greg Fox is the main antagonist in Smallville The Comic story "Raptor".
Greg Fox was notorious for lighting firecrackers in mailboxes and overall a juvenile delinquent. While on a field trip to a paleontology dig, Greg bumped into Clark Kent and Chloe Sullivan. Apparently, however, he wasn't really that hostile until just recently. Lex called him on his attitude, and Greg storms off. Lex explains that he owns this dig site, and that Greg's father was fired for attacking a foreman weeks ago. Greg readies a firework, muttering about Luthor's actions against his father. He tosses it into a dig, not realizing that it was full of blasting caps. Clark runs and positions himself between Greg and the caps, and they explode. Luckily, Clark wasn't hurt, but Greg was rushed to the hospital.
At the hospital, Greg is smacked by his father for his behavior after the nurse leaves. Due to a piece of meteor rock present at the site, Greg starts to mutate into a raptor. Lex visited Clark to tell him he wasn't pressing charges on Greg because he can relate to having an angry father and no mother. Back home from the hospital, Greg goes to the bathroom in pain and looks in the mirror to see a decidedly dinosaur type eyeball. He went downstairs to tell his father that he was hungry, and then kills him. At the Talon, several days later, they wonder where Greg is. Lana seemed a bit disturbed thinking of her parents and how she started the Talon back up for them. In the store room, she hears noises, and goes to investigate when Greg appeared and tries to eat Lana.
Clark hears the commotion, and uses his X-ray vision to see what's happening. He tells Pete to call 911 and Pete goes to do so while Clark heads into the storeroom. Greg surprises Clark and attacks him. Clark punches Greg through the wall. Pete and Chloe rushed in to find the wall torn through and Greg gone. Chloe picked up a raptor tooth and identifies it. They realize that Greg is going after Lex, and Clark takes off for the plant. Meanwhile, Greg killed two guards and sneaked up on another tearing him up pretty badly, demanding to know where Lex was. He finds Lex, and tells him he wants to be made normal. Lex offers to help, but Greg merely beats him further. Greg is mutating further and knocks Lex out.