William Corey Duffel (born April 11, 1984) known as Corey Duffel, is a professional skateboarder from Walnut Creek, California.Duffel's sponsors include Foundation Skateboards, Converse (shoe company), Venture Trucks, Mob Grip, Pig Wheels, Metro Skateboard Shop, Armourdillo, CCS magazine, Skullcandy headphones, and Bones Swiss Bearings.