Dale Sebastian Doback is Robert's son, Nancy's stepson, and Brennan and Derek's stepbrother, and the deuteragonist of Step Brothers. He is potrayed by John C. Reilly.
Dale is a beautiful 41 year old, man-child because he always wears his Chewbecca mask, he plays Guitar Hero, he has a treehouse in which he keeps his nude magazines and everything else, night-vision goggles, he is builled by a middle school kids. He sleepwalks just like Brennan. Dale, used to want to be a doctor, but dropped out of school. Dale is really good at playing the drums and won't let anyone touch his drumset or enter the room where his drums are.