During the "Civil War" storyline, Jameson helped Captain America while the latter was in hiding. He was assisting She-Hulk in locating and signing up unregistered superheroes. Jameson had also been registered as the Man-Wolf under the Superhuman Registration Act. During this time, the villain Stegron the Dinosaur Man temporarily transformed him into the Man-Wolf again, as a side-effect of a mad scheme to devolve the entire population of New York City. He attacked Mary Jane Watson and May Parker in Avengers Tower, but was subdued by Tony Stark's Guardsmen before he could harm them. Reed Richards subsequently cured him of this form.